10 Best Marine Fiberglass Repair Kits 2026 in the United States

The TotalBoat 5:1 Marine Epoxy Resin Kit is designed to handle a variety of repair and building projects involving fiberglass, wood, carbon fiber, and other materials commonly found in boats and marine equipment. It is a strong, marine-grade epoxy that creates durable, water-resistant bonds and coatings, making it well suited for structural repairs and surface restoration. The kit is versatile, working well for bonding, filleting, laminating, and coating, and supports the addition of fillers to customize thickness and shape. It comes with color-coded pumps and mixing supplies, which simplifies measuring and mixing the resin and hardener, an important step for users who want an easier application process.

The kit offers two hardener speeds—slow and fast—giving flexibility depending on the repair timeline, with pot lives of around 20 and 12 minutes respectively at 75°F and a full cure time of 24 hours. This balance allows for good working time without excessively long waits. While it is not intended for clear coat finishes, it cures to a solid that can be sanded and painted over, which is ideal for marine repairs exposed to moisture, salt, and weather. One potential drawback is the relatively short working time with the fast hardener, which may require some experience to avoid rushing. Additionally, the kit does not include some specialized tools like brushes or gloves, so these may need to be purchased separately.

This kit is a reliable choice for boat owners or hobbyists looking for a durable, professional-quality marine epoxy that handles multiple materials and repair types with good ease of use and lasting results.

The TotalBoat 5:1 Marine Epoxy Resin Kit is a versatile and strong option for repairing or building marine fiberglass and other composite materials. It uses a marine-grade epoxy resin designed for bonding, coating, and laminating, making it suitable for fixing boats, kayaks, and other watercraft. This resin is known for forming strong, durable bonds that resist water, salt, and weather, which is essential for long-lasting marine repairs. The kit's 5:1 resin-to-hardener ratio comes with color-coded pumps, making it easier to mix accurately without guesswork.

It offers both fast and slow hardeners, allowing users to choose between working time and cure speed, with a curing time ranging from about 12 minutes (fast) to 20 minutes (slow) pot life and a full cure taking up to 5 days. This flexibility can help with different project sizes and skill levels. The kit is compatible with fillers and additives, so you can customize it for gap filling or smoothing surfaces, which adds to its usability for various types of damage, from cracks to larger structural repairs.

This product is not intended for clear coating, meaning it might require additional finishing layers if a glossy, transparent look is desired. While the kit includes mixing pumps and supplies, users still need to have some basic tools and preparation knowledge to get the best results. However, the low viscosity and self-leveling nature of the resin make it relatively user-friendly, even for those without advanced experience. This kit is well suited for boat owners and hobbyists looking for a dependable, adaptable epoxy system that performs well in marine environments and offers good strength and longevity.

The TotalBoat Polyester Structural Repair Putty is designed for strong, versatile repairs on boats, working well for fiberglass, wood, metal, and polyester surfaces both above and below the waterline. Its polyester resin mixed with long strand glass fibers gives it good strength, impact resistance, and flexibility, making it suitable for structural fixes like bonding decks, filling holes, or repairing dents. The putty comes pre-thickened with a paste-like consistency that spreads easily and resists sagging, which helps even beginners apply it without much trouble. You mix in a small amount of hardener (MEKP), and it gives you about 15-20 minutes of working time at room temperature, with a full cure taking around 24 hours. This curing time is fairly typical, providing enough time to shape or bond before it hardens. The kit includes the repair putty and hardener, so you have what you need to get started without buying extra parts.

Once cured, it sands smoothly and can be finished with additional polyester compounds or gelcoat for a neat look. On the downside, polyester resin can be a bit less user-friendly than some alternatives (like epoxy) because it has a stronger odor and requires careful mixing of the catalyst. Also, while it's water-resistant and durable, it might not offer the absolute highest longevity compared to some specialized marine epoxies. The product offers a solid balance of strength, ease of use, and versatility, especially if you want a solution that works well for both structural repairs and cosmetic finishing on boats and similar materials.