10 Best Fiberglass Boat Repair Kits 2025 in the United States

The Polymer World Polyester Resin 10 Gallon Kit with MEKP is a versatile solution suitable for various applications, from boats to surfboards and even automobiles or bathtubs. One of its key strengths is the ease of application, allowing for quick wetting and spreading of the resin. This makes it ideal for both spray-ups and hand layups, catering to different repair or building needs.

The resin’s excellent tackiness is another advantage, as it remains sticky for a longer period, facilitating the application of multiple layers and enhancing adhesion strength. Additionally, the resin's superior formula ensures cleaner results, preventing sagging or flowing on sloping surfaces and minimizing pattern print-throughs on gelcoat finishes. This kit includes a 2 fl oz bottle of MEKP catalyst, which means you don't need to purchase a separate hardener, adding to its convenience.

The fact that it is marketed by a Florida-based business with over seven years of experience in the boating industry adds credibility. Despite these considerations, the Polymer World Kit appears to be a reliable and practical option for various fiberglass repair tasks.

The TotalBoat Polyester Structural Repair Putty offers a comprehensive solution for high-strength structural repairs, making it suitable for a wide range of materials including fiberglass, wood, metal, and polyester laminates.

Its pre-thickened, fiber-reinforced polyester putty ensures robust filling, bonding, and bedding, both above and below the waterline. This product is specifically designed for marine applications but is versatile enough for use in automotive, construction, and even aerospace repairs.

The inclusion of long strand glass fibers enhances its strength, impact resistance, and elasticity, which is essential for heavy-duty repairs like bonding decks or filling screw holes and dents. The kit comes with a hardener (MEKP) for easy mixing and application, and the paste-like consistency helps in spreading without sagging. Additionally, it has a fast-setting time and is compatible with further finishing products like TotalBoat Fairing Compound and Gelcoat.

One downside noted is the kit's reliance on the correct ratio of hardener to achieve the optimal working time, which may require some practice to perfect. It is available in convenient sizes, including a gallon kit, catering to both small and large repair jobs.

The TotalBoat-409337 TotalFair Marine Epoxy Fairing Compound is an excellent option for those needing to repair fiberglass, wood, aluminum, and steel surfaces on boats and other watercraft. This gallon kit offers a high-strength, lightweight two-part epoxy filler that smooths and fills dents, holes, and gouges effectively. One of its standout features is the superb bonding capability, providing a permanent and waterproof finish without pinholes, making it suitable for both above and below the waterline repairs.

The improved formula allows for a hassle-free mixing process with a 1 to 1 mix ratio, simplifying the preparation as the blue and yellow components turn green when ready. The compound is also designed to be easily spread and feathered to a fine edge without sagging, even on vertical surfaces, which is a significant advantage for varied repair needs. Additionally, it cures quickly within 4 hours at 80°F, and the resulting surface sands easily, ready for painting with compatible primers and paints.

However, it's important to note that TotalBoat Gelcoat cannot be applied directly over this compound, necessitating an additional step of applying a 2-Part Epoxy Primer or TotalProtect first. While this product excels in many areas, potential users should be prepared for this extra step to ensure proper curing if using gelcoat. With options available in different sizes, including 2-pint, 2-quart, and 1-gallon kits, users have the flexibility to choose the amount that best suits their project needs.