Patch Booster Additive for Gelcoat, Quart

Model # 24245458 Mfg # 152426
4.9 out of 5 Customer Rating
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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Patch Booster Additive for Gelcoat, Quart
Model # 24245458 Mfg # 152426
4.9 out of 5 Customer Rating
Orders placed by 3 PM EST typically ship the same day. Orders placed after this time will be processed the next business day.
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Patch Booster Additive for Gelcoat 1 quart can

Patch Booster Additive for Gelcoat Make your gelcoat repairs easier and achieve a smoother, more professional finish with Patch Booster Additive for Gelcoat. Designed specifically for polyester gelcoats, this easy-to-use additive helps improve the way your gelcoat sprays, cures faster, and leaves behind a harder, glossier finish that blends in beautifully. Whether you're fixing small chips, scratches, or other surface imperfections, Patch Booster helps reduce the "halo" effect that can make repairs stand out. Best of all, it creates a tack-free finish without the need for wax or sanding aid additives, saving you time and simplifying the repair process. Mix 15% Patch Booster with your gelcoat by weight (for example, 85g gelcoat + 15g Patch Booster). Then add MEKP catalyst according to your gelcoat manufacturer's recommendations. Patch Booster is designed for gelcoat patch repairs and touch-ups only. It is not intended for standard in-mold gelcoat applications.

Key Features

  • Makes gelcoat easier to spray for smooth, even patch repairs.
  • Cures quickly to a tack-free finish, so you can sand and polish sooner
  • Creates a harder, glossier repair that blends better with the surrounding surface.
  • Helps minimize the appearance of repair halos.
  • No wax or sanding aid additives required.

Application Method Spray
Best Use The best use for Patch Booster Additive for Gelcoat is small gelcoat repairs where you want a factory-quality finish with minimal sanding and polishing.
Capacity 1 Quart
Case Sold By The Each
Clip No Clip
Coverage Coverage: Patch Booster is an additive and is not applied on its own. One quart treats approximately 5½–6 quarts of polyester gelcoat when mixed at the recommended 15% ratio. Actual repair coverage will vary depending on gelcoat thickness and the size of the repair.
Cure Time Typical cure times at 70–77°F (21–25°C) are: Tack-free: Approximately 1–2 hours Ready to sand: Once the repair is fully tack-free and hard, typically 1–2 hours Full cure (recommended): Overnight (12–24 hours) for maximum hardness, gloss, and durability
Height 5 Inch
Length 4.3 Inch
Recommended Usage Boat and marine gelcoat repairs — repairing chips, scratches, cracks, and surface imperfections. Fiberglass touch-ups — improving the appearance of localized repairs on fiberglass parts and surfaces. Color-matched gelcoat repairs — helping patched areas blend more naturally with the surrounding surface. Spray-applied patch repairs — reducing gelcoat viscosity for easier application and better flow.
Type Additive
Weight 2.2 Pound
Width 4.3 Inch

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