CRC 121 Epoxy Repair Adhesive 500ml With Integrated Glass Fibres For Fiberglass Strength Repairs DIY

CRC 121 Epoxy Repair Adhesive is a breakthrough epoxy solution designed to make durable repairs quicker, cleaner, and more versatile. With glass fibres already integrated into the hardener, this epoxy polymer brings fiberglass-strength performance without the hassles of traditional fibreglassing.

• 1:1 mix ratio — simple, precise proportions that deliver reliable results every time, without guesswork.
• Integrated glass fibres — high tensile strength combined with flexibility, so repairs stay strong under stress and movement.
• No fibreglass cloth, tools or solvents required — eliminates the need for cloth, scissors, brushes, rollers, and clean-up solvents, speeding up repairs and reducing waste.
• Bridges gaps and is self-supporting — you can form the repair profile as you work, even in awkward or hard-to-reach areas.
• Waterproof and substrate-friendly — designed to resist water ingress and osmosis, safe on polystyrene and most plastics.
• Can be applied in the wet — offers on-site repair capability where other epoxies might struggle, expanding where and how you can fix damaged surfaces.
• Non-flammable, low odour, no solvent — safer to use in enclosed spaces and indoors compared to some traditional repair methods.
• Waste-efficient — fewer consumables and less material waste than conventional fibreglass repairs.

Ideal use cases

• Marine and watercraft repairs such as hull patches, transoms, or cracked sections where a strong, waterproof bond is essential.
• Automotive and outdoor equipment repairs — plastic housings, trailers, bins, and damaged panels that require a robust, flexible fix.
• DIY and professional repairs on furniture, toys, or structural components that benefit from a self-supporting, mouldable repair material.
• Projects involving polystyrene or other plastics where solvent-sensitive materials are a concern.

What you get — a 500 ml kit of CRC 121 Epoxy Repair Adhesive designed to deliver fiberglass-strength repairs with less fuss and waste than traditional methods.

Whether you’re tackling a marine ding, a cracked plastic bumper, or a damaged frame, CRC 121 Epoxy Repair Adhesive provides an all-in-one solution that combines strength, flexibility, and ease of use. It’s the practical choice for professionals and DIYers who want dependable, long-lasting repairs without the usual fibreglassing setup.