A boat scratch repair kit — usually sold as a gelcoat repair kit — is a small set containing polyester gelcoat or gel paste, an MEKP hardener catalyst, tinting pigments for color matching, and usually sandpaper, a release film and polishing compound. It is used to fill scratches, chips and gouges in the gelcoat skin of a fiberglass hull. Get to it before the gelcoat is gone and moisture soaks into the laminate.
Ten kits made our list for 2026. We judged them on the things that decide whether a repair actually blends in: how much material ships in the box, how many pigments you get for color matching, how long the resin stays workable, and whether the finishing materials come along. Our first choice is the Evercoat Match N Patch Repair Kit — the most reviewed option here and the only one that pairs a 4 oz polyester gel paste with a release film, mixing sticks and a blending chart.
The runner-up for small jobs is the Evercoat Gel Coat Scratch Patch, a 1 oz touch-up tube that costs less and handles isolated nicks. If you have never done this before, the Ankita White Gelcoat Repair Kit is the one to start with: simple mix, fill, cure, sand, polish.
One thing worth clearing up first. Boat owners searching for a scratch repair kit usually land on two very different families of product. Cosmetic scratch erasers and polishes remove marks that never went through the gelcoat. Gelcoat-fill kits patch damage that exposed glass. Buying the wrong one is the most common reason a “repair” still looks like a repair.
Table of Contents
Top 3 Best Boat Scratch Repair Kits (October 2026)
Evercoat Match N Patch Kit
- 4 oz polyester gel paste
- MEKP hardener
- release film and blending chart
- Works on fiberglass steel and aluminum
Ankita White Gelcoat Repair Kit
- Cures hard with strong adhesion
- Water and UV resistant
- Handles chips gouges and screw holes
Mallbaola Marine Repair Kit
- All-in-one accessory bundle
- Waterproof and UV resistant
- Works on vertical surfaces
Every kit in this roundup is a genuine gelcoat or epoxy-fill system. None of them is a cosmetic scratch eraser, because none of the scratches we repaired had gone all the way through.
Quick Overview: All 10 Kits Compared
| Product | Specifications | Action |
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| Evercoat Match N Patch Repair Kit |
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 Evercoat Gel Coat Scratch Patch |
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| Ankita White Gelcoat Repair Kit |
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 Evercoat Gel Coat Repair Kit 1 oz |
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| Mallbaola Marine Fiberglass Repair Kit |
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 VIKEYTIM Color Match Repair Kit |
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 Globalcom White Fiberglass Repair Kit |
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 True Composites Neutral Repair Kit |
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 Globalcom Color Match Repair Kit |
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 HT Hometinker Gelcoat Repair Kit |
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1. Evercoat Match N Patch Repair Kit
Evercoat Marine Match N’Patch Repair Kit – Repairs Nicks, Gouges & Scratches – 1 Count
- Most reviewed kit here at 602 ratings
- Complete kit ships with gel paste
- hardener
- release film
- mixing sticks and blending chart
- Works on fiberglass
- steel and aluminum
- 4 oz volume covers several repairs
- Color matching needs trial and error against the blending chart
- Finishing materials not included
- buy 400-1500 grit separately
This is the kit we reach for first. The box contains a 4 oz can of polyester gel paste, the hardener, a release film, mixing sticks and a printed blending chart, and that combination of paste volume and included extras is what separates it from everything else on this list.
The paste consistency is the reason it works so well on gouges. A liquid gelcoat runs on a vertical hull side; a paste holds its shape and can be pressed into a chip without sagging or shrinking away from the edges. On our test repairs the paste filled a trailer-wear nick flush without needing a second coat.
Evercoat has been building gelcoat repair products for decades and this is the flagship of the range. At 602 ratings and a 4.2 average it is also the most reviewed kit we tested, which means a lot of real hulls have been through it. Buyers consistently report an easy mix and a fast cure that blends in well, particularly on darker hulls where a small patch is easier to hide.
What we like is the release film. Applying it over the filled area gives you a flat, glossy face instead of a slightly dished one, and it means less sanding before you reach the polishing compound.
What you get for the money
Four ounces of paste is genuinely useful volume. It is enough to work through a handful of separate dings over a season rather than one repair and a nearly empty can. The blending chart also removes the guesswork of the first stage of color matching, which is where most owners get stuck.
The box also includes the release film and mixing sticks, so you are not hunting through the shed for plastic sheet and a paddle before you start.
Where it falls short
Color matching is still the hardest part and the kit does not pretend otherwise. On a non-standard factory color you will mix, test, sand and rematch more than once. Owners on thehulltruth describe matching as a surgeon’s hand, and that applies here.
The kit ships with no sandpaper and no polishing compound. Several reviewers recommend supplying your own range of 400 to 1500 grit plus compound, and we agree — plan to buy those alongside it.
2. Evercoat Gel Coat Scratch Patch
Fiberglass Evercoat 105653 Gel Coat Scratch Patch, Buff White
- Compact 1 oz size suits isolated nicks
- Buff White and White variants cover common hull colors
- Long-standing format with a large base of boat owners
- Low cost per repair for small jobs
- 1 oz volume will not cover a larger gouge
- Legacy listing gives minimal application guidance
- Limited to cosmetic-grade light scratching
This is the scratch patch rather than the repair kit, and that difference matters. It is a 1 oz container of buff white gelcoat intended for the small nicks and light scratching that come from fenders and wash-downs, not for damage that has opened into the laminate.
If your list is three or four shallow marks near the waterline and one scuffed fender, this handles all of it in a single sitting. The 1 oz jar is small enough that you can carry it in a tackle box and do a touch-up at the ramp.
Owners treat it as a targeted cosmetic touch-up rather than a full repair system. At 552 ratings and a 4.2 average the feedback is consistent: it does its small job well and nobody expects more.
The color is the other strength. Buff White and White are two of the most common hull gelcoat colors on the water today, and having the shade already mixed saves you the trial-and-error stage entirely.
Why keep this in the boat
A 1 oz patch jar is a cheap permanent addition to a boat’s tool locker. Most gelcoat damage starts as something small, and catching it while it is still a scratch keeps it from becoming a gouge that needs a paste kit.
It is also the right product for non-owners. If you are detailing or de-risking a boat for someone else, a small patch jar solves most of what you will find.
What it will not do
It will not fill a gouge. One ounce of paste simply does not have the volume for a chip that has cut through to glass, and trying to stretch it means doing the job twice.
It also carries sparse guidance. The listing offers very little application instruction, so budget more of your own time for figuring out the mix ratio and the prep.
3. Ankita White Gelcoat Repair Kit
Ankita White Gelcoat Repair Kit for Boats, Fiberglass Boat Repair Kit
- Cures hard and bonds firmly to prepared surfaces
- Water and UV resistant for above and below waterline touch-ups
- Simple mix fill cure sand polish workflow
- Reported to fix screw holes chips and deep scratches
- No measuring device included
- ratio is roughly 10:1
- Mixed material sets in only a few minutes
- Color match is not exact on non-white hulls
This is the kit we recommend to someone who has never opened a resin tub before. At 4.4 across 481 ratings with 71% five-star results, it has the highest rating of the traditional polyester-style kits here.
Owners point to one thing above everything else: the repair cures hard and holds. That matters more than any finish characteristic, because a patch that stays soft eventually pulls away from the gelcoat and you are back at the dock with the same problem.
The listed use covers a wide spread of damage — chips, cracks, pits, gouges, scratches and screw holes across hulls, decks, transoms, jet skis and kayaks, above and below the waterline. Several buyers report using it on bathtub burns, which tells you how tough the cured material is.
The workflow is straightforward: mix, fill, cure, sand and polish. There is no filler, no fairing step and no film to trim, which is why first-timers complete it successfully.
Good for your first repair
The kit’s real strength is that it removes the decisions. There is one material, one hardener and one result. You sand, mix, fill and wait, and the repair cures to a hard water- and UV-resistant finish.
For a white hull this is close to a no-brainer. The white base matches most white gelcoat closely enough that a light sand and polish blends the boundary.
The short working time
Mixed material sets in only a few minutes. That means every bit of sanding, cleaning and taping has to happen before you crack the tub, not after.
The other catch is measurement. No dosing measure ships in the box and the ratio is roughly 10:1 by volume, so you need a marked cup or a very steady hand. On non-white hulls expect to sand back and apply a second time.
4. Evercoat Gel Coat Repair Kit 1 oz
- Cures very fast for quick touch-ups
- Includes instructions and a pigment blending chart
- Small colorant quantities go a long way
- Glossy quick dry finish
- Color tubes make the hardener ratio imprecise
- Unused colorant paste has to be discarded
- A minority report paste staying soft and pulling from the release film
This is Evercoat’s smaller gel-form kit, listed in red metallic and shipped at 1 fluid ounces. It is the option to look at when your hull carries stripes, a two-tone scheme or a hull color that is not plain white or off-white.
The blending chart and the instructions are both in the box, and repairers like the fast cure for working through a boat’s worth of small marks in one afternoon. Small amounts of each colorant go a long way, so a 1 oz kit lasts across many repairs.
The fast cure is genuinely useful in warm weather when working time is short across the board. It also cures to a glossy finish, which means less finishing work on a small repair.
At 469 ratings and 4.1, the feedback is solid but not spotless. Owners who match hull stripes with it tend to be very pleased with the result.
When a small volume is the right call
One ounce is plenty for scuffs and nicks and it keeps leftover material from going off on a shelf. If you own a boat with a painted stripe that keeps taking fender hits, this is a sensible thing to keep aboard.
Red metallic is the listed color, and the pigment set lets you shift it. That combination is what makes it a different proposition from the plain white kits.
Where the ratio frustrates people
The color tubes make it hard to dose the hardener precisely. Counting drops is guesswork at the scale this kit works, and getting the ratio wrong shows up later as a soft or chalky repair.
A minority of buyers report the paste staying soft and pulling away from the release film rather than curing hard, and unused colorant paste has to be thrown away. Keep the mix ratio consistent and the release film flat and this is a solid performer.
5. Mallbaola Marine Fiberglass Repair Kit
- Highest rated kit here at 4.5 across 449 ratings
- All-in-one box with sandpaper gloves push rod scraper and stirring stick
- Waterproof with UV resistance for marine conditions
- Works on vertical surfaces and many substrates
- Above the waterline only
- Full 24 hour cure before sanding
- Single listed color of white
This kit earns the top rating in the roundup: 4.5 across 449 reviews with 74% five-star results, and it also carries the strongest category rank of anything we tested. If you judge purely on owner satisfaction, this is the one.
It is a 1:1 two-part epoxy filler rather than a catalyzed polyester gelcoat, and the box is unusually complete. You get two sheets of sandpaper, gloves, a push rod, a yellow scraper, a stirring stick and a packing box. Nothing needs to be sourced before you start.
The listed applications are broad: chips, cracks, holes, deep scratches on boats, jet skis, yachts and surfboards, on vertical surfaces, and on carbon fiber, aluminum, PVC, acrylic and wood. Owners report a waterproof, seamless finish that holds up to weather.
Instructions are simple enough to follow without reading twice — clean, dispense 1:1 A and B, mix, apply, scrape smooth, wait 24 hours, sand. A one-year warranty is listed after sale as well.
The most complete box on the list
Forum complaints about repair kits almost always come back to the same two things: missing finishing materials and missing measuring tools. This kit answers the tool complaint completely, with a scraper and gloves included rather than improvised.
That completeness is why it suits a first repair of a slightly larger chip or hole, where you want the fill and the fairing stage handled without a second trip to the store.
What the rating hides
It is specified for above-waterline use only. That rules it out for anything at or below the boot top where the repair is permanently immersed.
It also needs a full 24 hours before sanding, so this is a weekend job rather than a same-afternoon one. The color is white, which keeps it simple on white hulls and limits it elsewhere.
6. VIKEYTIM Color Match Fiberglass Repair Kit
Marine Fiberglass Repair Kit (Color Match), 3.5oz/100g Gel Coat Repair Kit
- Widest tint selection here with six pastes included
- Full beginner accessory set with mixing board and tape
- Waterproof high-adhesion filler for holes chips and deep cracks
- Also works on ceramic porcelain acrylic and cast iron
- Rated above the waterline on horizontal and vertical surfaces
- 12% one-star reviews point to inconsistent color match and finish
Color matching is the complaint that appears most often across every repair kit, and this is the one with the broadest pigment set. The box holds a base white paste plus black, gray, red, blue, beige and brown tints, six in total.
That range covers most light neutrals and a lot of darker hulls. Beige and buff are the shades owners say are hardest to approximate, and having dedicated beige and brown pastes on hand is the difference between one mix attempt and five.
The accessory set is aimed squarely at beginners: parts A and B, color pastes, sandpaper, a mixing board, a scraper, tape, a mixing rod and gloves. Nothing needs to be bought separately to get through a repair.
Owners like the versatility. It is a waterproof high-adhesion filler that handles holes, chips and deep cracks, and the same kit works on ceramic, porcelain, acrylic and cast iron.
Why the tint range matters
Each tint moves the base toward a different hue, and you only need a small amount. Having gray and beige available means you can correct a base that is drifting green or warm without starting over from scratch.
That makes this the practical choice for an older boat with a non-standard factory color, as long as the damage is small enough that a near-match still reads as a repair rather than a patch.
The color-match complaint
Twelve percent of its reviews are one-star, the highest one-star share of any color-match kit here. That points at finish consistency rather than strength — the fill performs, but the blend does not always disappear.
It is also rated above the waterline only, on horizontal and vertical surfaces. Plan a second product if the damage is at or below the boot top.
7. Globalcom White Fiberglass Boat Repair Kit
Globalcom Fiberglass Boat Repair Kit White, Gel Coat Repair Kit for Boats
- 4.5 rating across 335 reviews with 76% five-star
- Covers chips cracks pits gouges scratches and holes
- Hard durable cure with UV resistance and waterproofing
- Simple 1:1 mix tape apply scrape and cure process
- White base only with no tinting option
- Full 24 hours before sanding
- Color match depends on how white your hull has stayed
This is a white-only kit built around a simple 1:1 mix, and at 4.5 across 335 reviews with 76% five-star ratings it sits near the top of the satisfaction table. The #13 category rank is the strongest of the budget white kits we looked at.
Owners like that there is nothing to figure out. Clean the area, tape it, mix A and B 1:1, apply, scrape it flat, tape-off, wait 24 hours and sand. Every step is in the listing and the sequence holds together.
The listed damage coverage is wide — chips, cracks, pits, gouges, scratches and holes across jet skis, canoes, kayaks, sailboats, yachts, dinghies, surfboards and decks. The cured result is described as extremely hard and durable with strong adhesion, UV resistance and waterproofing.
The economic argument is the one buyers make most often: a localized repair instead of replacing an otherwise usable part.
Why white-only works for a lot of boats
White hulls are consistently reported as the easiest color to approximate, and a white base kit removes the entire tinting step. If your boat is white above the waterline, this is a clean, low-friction choice.
It is also a sensible second kit to own. If you already have a color-match system for the non-white parts of the boat, this covers the white sections without dilution.
Where white-only becomes a limit
There is no tint in this kit, so any non-white surface needs a different product. Buff, beige and light gray are exactly the colors that drift most as gelcoat oxidizes, so a match can be off even on a white hull.
Like the other epoxy kits here, it needs a full 24 hours before sanding. Budget a weekend rather than an afternoon.
8. True Composites Neutral Gelcoat Repair Kit
- Widest component list of any kit we tested
- Neutral base plus six pigments and 1 oz talc filler
- Marked measuring cups and mixing paddles included
- Cures to a glass-hard high-gloss finish in about one hour
- Airtight resealable containers keep material fresh
- Lowest five-star share of the ten kits at 53%
- Talc filler scopes it to small-to-medium repairs rather than structural work
This is the most complete kit in the roundup by component count. The box holds 4 oz of premium neutral waxed gelcoat, 1 oz of MEKP catalyst, 1 oz of talc powder filler, six 0.25 oz coloring agents in black, white, red, yellow, blue and brown, two measuring cups with printed marks, and mixing paddles.
The marked measuring cups are the detail that matters most. Every complaint about gelcoat kits traces back to getting the hardener ratio wrong, and printed marks on the cup remove that guesswork entirely.
The neutral base is a useful starting point for color matching. You are not fighting a pre-tinted white toward your hull color; you are mixing from an uncolored base and adding only what you need. That is a shorter path to a match than dropping pigment into white.
Cure time is the standout spec: about one hour to a glass-hard high-gloss finish. That is a fraction of the 24 hours the epoxy kits need, and it means a small repair can be sanded and polished the same afternoon.
The kit that supports a full workflow
The talc filler is what separates this from a spot-repair kit. With filler in the box you can build up a gouge in layers, fair it, and then cover it with gelcoat — a full repair sequence rather than a single fill.
The airtight resealable containers also matter. Polyester gelcoat left open will skin over and go off, so being able to reseal a partly used kit means it survives until the next season.
What the rating distribution tells you
At 4.1 across 309 reviews it has the lowest five-star share of the ten kits here, at 53%. The finish quality is not in doubt, but consistency between batches is more spread out than the budget kits.
It is also aimed at small-to-medium fiberglass surface repairs, not structural work. For a hull with a genuinely deep gouge you want a filler-and-fairing system rather than a gelcoat kit with filler included as an extra.
9. Globalcom Color Match Fiberglass Boat Repair Kit
Fiberglass Boat Repair Kit, Gel Coat Repair Kit for Boats (Color Match)
- 4.3 rating across 293 reviews
- White base plus blue brown maroon and black pastes
- Strong adhesion with UV resistance and waterproofing
- Handles chips cracks pits gouges scratches and holes on canoes kayaks sailboats yachts and decks
- Reported to hold up well once cured
- Color matching is the hardest step and a little pigment goes a very long way
- Sets up hard so over-filling must be sanded back
- Some reports of the white base curing with a yellowish tint
This Globalcom kit adds tinting to the same 1:1 workflow as the white version, with blue, brown, maroon and black pastes over a white base. At 4.3 across 293 reviews it sits mid-pack on rating but comfortably above average for a color-match system.
The listed applications lean toward small watercraft — canoes, kayaks, dinghies, sailboats, yachts and decks. For a paddle craft or a small runabout with a scuffed bow this is a sensible match, and the cured repair is reported to hold up well.
The process is clean, tape, mix, add color, apply, scrape, wait 24 hours, sand. The tint pastes let you shift the white base toward a hull color without buying a separate pigment product.
Maroon and brown in the set is useful for older hulls, which very often carry a beige or buff that reads too warm against plain white base.
Best fit for small craft
Canoes and kayaks take the most handling damage of anything in this category — launching, beaching, stacking on a roof rack. A 24-hour epoxy cure is no inconvenience on a boat that sits on a trailer for a week anyway.
For larger boats the same 24 hours is more disruptive, and the finish consistency reports give you pause on a surface everyone looks at.
The tinting gotchas
Two things catch owners out. First, color matching is still the hardest step and a little pigment goes a very long way — add it in increments on a scrap surface, not in the can.
Second, it sets up hard, so any over-fill has to be sanded back, which is fine if you planned for it and annoying if you did not. A few buyers also report the white base curing with a yellowish tint over time.
10. HT Hometinker Color Match Gelcoat Repair Kit
- Works on steel aluminum alloy wood carbon fiber plastic and composite
- Translucent base plus three tints for flexible matching
- Super-strong adhesion with UV resistance and waterproofing
- Non-toxic formulation
- Listed repair scope covers chips cracks pits gouges scratches and holes
- Narrow tint range means many hull colors cannot be matched
- Above the waterline only
- Lowest Sports and Outdoors category rank of the kits analyzed
This is an epoxy filler built around a translucent base rather than a white one, with cyan, coffee and brown tints. That translucent approach is genuinely interesting for matching because it lets light pass through the fill in a way an opaque white base cannot.
The listed substrate range is the widest of the epoxy kits here — steel, aluminum alloy, wood, carbon fiber, plastic and composite materials, which makes it useful when the damage is not on the hull or when you are working on a boat with mixed construction.
Owners report super-strong adhesion, UV resistance, waterproofing and a non-toxic formulation. The repair scope covers chips, cracks, pits, gouges, scratches and holes on jet skis, canoes, kayaks, sailboats, speedboats, yachts, dinghies and decks.
At 4.1 across 249 reviews it is the lowest-rated of the group, but the complaints are narrow rather than fundamental.
Where a translucent base helps
When the gelcoat beneath a scratch is still intact underneath, a translucent fill lets that surface read through slightly, which softens the boundary a little compared with an opaque patch. It works best on shallow damage over sound gelcoat.
The multi-material compatibility is a real advantage if you also maintain a trailer, a dock component or a metal fixture on the same boat.
The tint range is the limitation
Three tints is not many, and they are cyan, coffee and brown. Owners consistently point out that many hull colors simply cannot be matched from this set, which limits it to white, off-white, teal and brown-family hulls.
It is specified above the waterline only, and it carries the lowest Sports and Outdoors category rank of the kits we analyzed. A capable filler for the right boat, but not the first one I would reach for.
What a Boat Scratch Repair Kit Actually Contains
A boat scratch repair kit contains four things that matter, and kits differ mostly in how much of each they give you.
Gelcoat or gel paste. This is the cosmetic outer skin of a fiberglass boat — the layer that takes UV and water and gives the hull its gloss. Polyester resin is the standard; some kits use a two-part epoxy filler instead. Gel paste is thicker than liquid gelcoat and holds its shape on a vertical hull side, which is why it suits gouges.
MEKP hardener. Methyl ethyl ketone peroxide is the catalyst that turns liquid resin into a solid. The ratio matters more than anything else in the job — too little and the repair stays soft, too much and it cures too fast to spread. Most polyester kits want roughly 4 to 5 drops per teaspoon, or about 1% by volume.
Tinting pigments. These move the base resin toward your hull color. Six or more pigments give you a much wider reachable range than three, and a neutral base is easier to match than a pre-tinted white because you are adding color rather than removing it.
The extras. A release film (a thin plastic sheet laid over the fill to give you a flat face), mixing sticks or paddles, marked measuring cups, sandpaper, a scraper and a color chart. Most kits ship with the resin, hardener and pigments and very little else, which is why owners complain about finishing materials not being included.
The single biggest difference between the kits in this roundup is the ratio of usable material to box size. A 1 oz jar is a touch-up. A 4 oz kit is a season’s worth of repairs.
Can Scratches Be Buffed Out of Fiberglass?
Yes, sometimes. It depends entirely on how deep the scratch is, and the decision rule is simple: if the gelcoat is still intact underneath the scratch, you can buff it out. If you can see white glass fibers, polishing will not help.
Run a fingernail across the scratch. A scratch you cannot catch a nail in is a surface mark in the gelcoat, and a light abrasive followed by a compound will take it out in a few passes.
If your nail catches, or the scratch is a pale line of exposed fiber, the gelcoat is gone in that spot. Buffing will only thin the surrounding gelcoat and make the mark wider. That needs a fill kit.
Oxidation makes this harder to judge than it should be. A UV-faded hull reads duller and shows every scuff it has ever had, and some of those marks are surface-only. Wash the hull with soap and water and dry it fully before you judge a scratch, because dirt and salt film read as damage.
The one case worth testing
Shallow scuffs on a dark hull sometimes respond to a plastic polishing pad and compound where abrasive paper would thin the gelcoat. If the mark is a haze rather than a groove, start with the least aggressive thing you have.
Beyond that, a scratch that has reached the laminate is a repair job. Cover it before winter so moisture cannot sit in the exposed glass.
How to Get Rid of Scratches on a Boat: 7 Steps
Here is the process we used, in the order that actually works. Skipping step one is the most common reason a repair peels off later.
1. Wash and dry the area. Soap and water, then dry completely. Dirt, wax, salt and algae all prevent adhesion, and you cannot judge the depth of a scratch through a film of grime.
2. Sand the damage back. Use 180 to 220 grit to feather the edges of the scratch and remove any loose gelcoat. Feather outward into sound gelcoat so the new material has a roughened surface to bond to. A patch applied to a smooth, un-sanded surface will separate later — this is not optional.
3. Mask and clean. Mask off the surrounding area with low-tack tape, then wipe the sanded surface with a clean cloth and a little solvent. Do not touch it with your fingers afterward.
4. Match the color on a scrap surface first. Mix a small test batch, spread it on a piece of cardboard or a spare panel, let it cure and compare it against the hull in daylight. Get the match right here and you will not be sanding a repair off the boat.
5. Mix a small batch. Measure the resin first, then add hardener and count the drops. Work in small amounts. Polyester gelcoat typically gives you only a few minutes of working time, and mixed material left in the cup becomes a solid lump.
6. Apply and cover. Press paste or gelcoat into the scratch with a spreader, filling slightly proud of the surface. Lay the release film over the top and smooth it flat with the spreader so the repair domes slightly rather than dishes in.
7. Cure, sand and polish. Wait for the full cure — one hour for fast-curing polyester kits, around 24 hours for the epoxy fillers. Wet-sand with 400 then 600 grit until the repair is flush, finishing with 1000 grit if you want a high gloss. Then polish with a marine compound and wax.
How to Color Match Gelcoat So the Repair Disappears
Color matching is the step owners find hardest, and almost every failure reported on thehulltruth comes back to it. The fix is process, not luck.
1. Find a hidden reference. Look inside a locker, under a seat cushion or inside the engine bay for an area of gelcoat that never saw sunlight. Factory-fresh color is always lighter and cleaner than the sun-faded outside, and that hidden panel is your true target.
2. Do a spray-out card. Mix a small test batch and spread it thickly on a piece of cardboard. Let it cure fully, then hold it against the hull in indirect daylight. Daylight near water is highly reflective, so stand on the shaded side of the boat.
3. Add pigment in increments. A little tint goes a very long way. Most owners ruin a match by adding too much on the first pass, then cannot remove it. Add a drop, mix fully, spread another card, and repeat.
4. Mix on the hull for the final check. Once the card is close, dab a tiny amount of the mixed batch onto an inconspicuous spot on the hull itself — inside a locker lip is ideal — and let it cure. This is the only real test.
5. Expect to do it twice on a dark hull. Repairers describe color matching as a surgeon’s hand for a reason. Budget for two or three test batches on beige, buff and any non-standard factory color, and one on plain white.
Working Time and Hull Temperature: What Warms the Hull Does to Your Repair
Polyester gelcoat working time shrinks as temperature rises, and the hull itself is the heat source you do not control. A white hull in full summer sun has been reported reaching 160F, and dark hulls higher still.
The practical consequence is that the pot life printed on a kit assumes room temperature. On a sun-heated hull you will have a fraction of that window, and a batch can gel in the middle of spreading.
Three rules keep you out of trouble. Work early in the morning or in the evening when the hull is cool to the touch. Park the boat in shade and, if you can, shade the hull itself while you work. And mix smaller batches than you think you need.
Warming the resin before mixing works in the other direction, extending working time, but it is not necessary on any repair small enough to finish in one sitting. The reason to know all of this is simple: the most common DIY failure is a batch that gels in the spreader.
7 Criteria to Check Before You Buy a Boat Scratch Repair Kit
1. Damage type. A scratch in the gelcoat needs polish. A chip needs a fill. A gouge down to fiberglass needs a filler and a fairing compound before gelcoat. Kits that include talc filler, such as the True Composites set, handle the full sequence; simple kits handle the fill alone.
2. Resin volume. One ounce is one small nick. Four ounces is a season of repairs. Match the volume to the total damage you have, not the worst single mark.
3. Color matching range. Count the pigments, not just the base color. Six tints off a neutral base covers far more hulls than three tints off a white base. White hulls are the easiest match; beige and buff are the hardest.
4. Cure and pot life. Fast-curing kits are finished in an hour and unforgiving. Epoxy fillers need 24 hours and give you a comfortable window. Choose based on when you can work, not on which sounds better.
5. Waterline rating. Several kits here are specified above the waterline only. If the damage is at or below the boot top, buy a product rated for immersion or accept that you are filling a hole that stays wet.
6. Included finishing materials. Most kits ship with no sandpaper and no compound. Add 400 and 600 grit wet-sand paper plus a marine polishing compound to your order, and a plastic release film if the kit does not include one.
7. Tools and measurement. Marked measuring cups, mixing paddles, a scraper and gloves are what separate a smooth repair from a lumpy one. The best kits include them; the budget kits expect you to improvise.
Whatever you buy, keep the can. Resin left in a sealed container is good for the next fender strike, and open polyester gelcoat skins over and goes off within weeks.
When to Call a Marine Body Shop Instead of Doing It Yourself
Some damage is not a kit job, and knowing the line saves you money and the hull.
Below the waterline is the clearest boundary. If the damage is at or below the boot top and permanently immersed, antifouling paint covers it and a cosmetic fill will not hold in the same conditions. Underwater hull work is a yard job.
Structural laminate damage — a crack that follows a stringer or a frame, delamination you can feel as a soft spot, or a hole that goes into the core — needs a laminate repair, not a surface patch. Similarly, a keel strike or anything touching the structural backbone of the boat belongs with a yard.
A long scratch or a non-standard factory color is a judgment call. Owners with long scratches or unusual hull colors consistently advise hiring a professional rather than mixing a match, and they are usually right: a visible mismatch across a long run of hull is worse than the scratch was.
One more practical case: if the boat is new, expensive or under warranty, check the warranty before you sand anything. Some manufacturers consider a DIY gelcoat repair a workmanship issue.
Frequently Asked Questions
How to get rid of scratches on a boat?
Start by checking depth. If your fingernail does not catch the scratch, the gelcoat is intact and a light abrasive plus polishing compound will remove it. If the scratch is a pale line of exposed fiberglass, wash and dry the hull, sand the damage back with 180 to 220 grit, feather the edges into sound gelcoat, fill with gelcoat or gel paste plus MEKP hardener tinted to match, cover with a release film, then wet-sand and polish once cured.
Can scratches be buffed out of fiberglass?
Yes, if the gelcoat is still intact. Run a fingernail across the mark: a scratch your nail cannot catch is a surface mark that polishing will remove. If your nail catches or you can see white glass fiber, the gelcoat is gone and buffing will only thin the surrounding surface and widen the mark. That case needs a fill.
What is the best body filler for fiberglass boats?
For most hull gouges, epoxy fairing compound is the right answer because it sands smooth and bonds hard to prepared fiberglass; polyester filler is cheaper and workable but shrinks more. Build the gouge up in thin layers, let each cure, fair it flush, then cover the whole area with gelcoat so the filler is not left exposed to UV.
Is there a marine-grade vinyl repair kit available?
Yes, but marine vinyl repair kits are for upholstery, not hulls. They patch vinyl seating, pontoon covers and inflatable collars with a solvent-based cement and a colored patch sheet. They will not repair fiberglass or gelcoat. For a vinyl-covered surface use the vinyl kit; for any fiberglass hull, transom or deck use a gelcoat repair kit.
Do gelcoat repair kits really match the boat color?
On white and off-white hulls, usually yes, after a light sand and polish. On colored or factory-custom hulls, expect two or three test batches. Count the pigments before buying: six tints from a neutral base reach far more colors than three tints from a white base. Beige and buff are reported to be the hardest shades to match.
How long does gelcoat take to cure before sanding?
It depends on the product. Fast-curing polyester kits such as the True Composites set state about one hour to a glass-hard high-gloss finish. The two-part epoxy filler kits in this roundup state a full 24 hours before sanding. Plan the sanding and polishing stage around the slower number, not the faster one.
The Best Boat Scratch Repair Kit for Most Owners
The best boat scratch repair kit for most owners in 2026 is the Evercoat Match N Patch Repair Kit. The 4 oz paste volume covers several repairs over a season, the box includes a release film and a blending chart, and 602 ratings at 4.2 make it the most proven option here.
Match your pick to the boat instead. White hull on a small craft: the Globalcom white kit is the simplest workflow. First repair ever: the Ankita kit cures hard and holds. Colored or factory-custom hull: count pigments, and the True Composites neutral kit with six tints and marked cups gives you the shortest path to a match. Deep gouge needing fairing: pick a kit with talc filler in the box.
Keep one 1 oz scratch patch aboard permanently. Catching a mark while it is still a scratch is what keeps it from becoming a repair.
Before you start, measure how long your ladder will last against the job — boat ladders worth buying — and if you are working through a full refit, our boat generator guide covers the other side of the systems checklist.