10 Best Fiberglass Repair Kits 2025 in the United States

The TotalBoat High Performance Epoxy Kit is a versatile fiberglass repair kit featuring a clear, marine-grade epoxy resin and hardener. It is notable for its low-viscosity resin, which facilitates easy spreading and is ideal for clear coatings on wood, fiberglass, and metal surfaces. The kit includes calibrated pumps that simplify mixing by delivering the precise 2:1 ratio of resin to hardener, ensuring a proper cure without any guesswork.

A significant advantage of this kit is its non-blushing formula, eliminating the need for extra sanding or washing between coats, saving time and effort for both beginners and experienced users. It also offers flexibility through three hardener speeds (slow, medium, fast), allowing you to select longer or shorter working and curing times based on your project requirements. The full cure time can be up to 5 days, so it may not be the best choice for quick repairs. Its clear finish is BPA-free and safe for potential food contact areas, making it suitable for boat or kitchen projects.

The 1.5-gallon size suits medium to large repairs, though it might be excessive for small jobs. While effective on various materials including wood and metal, it is particularly well-suited for marine environments due to its water-resistant quality and strong bonding properties. This epoxy kit combines ease of use, strong adhesion, and a clean finish, making it a reliable choice when you can accommodate the necessary curing time.

The TotalBoat Polyester Structural Repair Putty is a marine-grade fiberglass repair kit designed for strong, structural fixes on boats and other surfaces like wood and metal. It uses polyester resin combined with long strand glass fibers, giving it good strength, impact resistance, and flexibility, making it suitable for bonding and filling above or below the waterline. The kit includes a hardener (MEKP) and putty with a paste-like consistency that is easy to spread and won’t sag, allowing precise application.

Its curing time can be adjusted by changing the amount of catalyst, with typical working time around 15-20 minutes and a full cure in about 24 hours. This makes it a good choice for both quick repairs and more involved projects. It sands smoothly once dry and can be finished with gelcoat for a clean appearance. Available in a gallon size, it’s ideal for larger jobs or frequent use, and its waterproof nature ensures durability in marine environments. However, the kit requires mixing with MEKP hardener, which needs careful handling, and polyester resin can produce strong fumes, so good ventilation is necessary. For cosmetic or fine surface work, a secondary fairing compound is recommended to achieve a smooth finish.

This kit is well suited for those needing a reliable, tough, and versatile fiberglass repair solution, especially in marine or automotive contexts where structural strength matters.

The Polymer World fiberglass repair kit offers a 1-gallon polyester resin paired with a sizable chopped strand mat, making it a solid choice for marine and vehicle repairs like boats, surfboards, and RVs. The polyester resin included is a common, versatile type that’s good for general-purpose repairs and provides decent strength when cured. It comes with a 2 oz bottle of MEKP catalyst, so you have everything needed for curing without extra purchases. Users will appreciate the resin’s tackiness, which stays longer to help you build up layers smoothly and improve adhesion. The kit is designed for easy application by hand or spray, and it holds well on sloped surfaces without sagging, which is great for tricky repair spots.

While polyester resin is durable enough for many repairs, it’s not as strong or water-resistant as epoxy resin kits, so it may not be the best fit for very high-stress or underwater repairs. The included chopped strand mat is a standard fiberglass reinforcement material that balances ease of use with good strength. This kit suits hobbyists or DIYers needing a reliable, ready-to-go kit for routine fiberglass repairs, especially for watercraft and automotive applications. It may be less ideal for professional-grade jobs requiring specialized resin types or advanced materials.