West Systems Epoxy Resin
WEST SYSTEM Epoxy Resin: Over 50 Years of Marine-Grade Performance
WEST SYSTEM has been the benchmark for high-performance epoxy resin since 1969, when the Gougeon Brothers — sailors, builders, and chemists — developed a formula purpose-built for the unforgiving demands of the marine environment. WEST SYSTEM Epoxy was created in 1969 by the Gougeon Brothers — sailors, builders, and formulators who know the engineering and chemistry required for high-performance composite structures. That founding philosophy is baked into every product they make: their two-part resin and hardener systems are developed for long-lasting repairs to high-performance composites, and the ability to tailor epoxy to exact needs without sacrificing performance is what WEST SYSTEM has always been about.
The 105 System: A Modular Approach to Epoxy
At the heart of the WEST SYSTEM lineup is the legendary 105 Epoxy Resin. 105 Epoxy Resin is a clear, low-viscosity liquid epoxy resin formulated for use with one of four WEST SYSTEM hardeners, and it can be cured in a wide temperature range to form a high-strength solid bond with excellent moisture resistance. The modular design is what sets this system apart: you select a hardener to control cure time at your working temperature, then adjust the epoxy with one of six West System fillers, or add one of several additives to create the specific coating properties you need.
Hardener options include the 205 Fast Hardener for rapid cures at cooler temperatures, 206 Slow Hardener for extended working time, 207 Special Clear Hardener for crystal-clear laminate and coating work, and the 209 Extra Slow Hardener for use in hot tropical conditions. The system is easily modified for a wide range of coating and adhesive applications and is especially suited for marine use, where superior moisture resistance and high strength are required.
G/Flex: Toughened Epoxy for Challenging Bonds
Beyond the core 105 System, WEST SYSTEM's G/Flex line addresses bonding situations where flexibility matters as much as strength. G/Flex 650 is a toughened, versatile, liquid epoxy for permanent waterproof bonding of fiberglass, ceramics, metals, plastics, damp and difficult-to-bond woods. The thickened variant, Six10 Thickened Epoxy Adhesive, combines the strength and reliability of a two-part WEST SYSTEM epoxy with point-and-shoot convenience.
Ready-to-Use Repair Kits
For boaters who want a complete, grab-and-go solution, WEST SYSTEM offers several targeted repair kits. From emergency dockside fixes to scheduled maintenance, WEST SYSTEM offers specialized Boat Repair Kits engineered for the most common marine materials, each designed with convenience in mind — compact, easy to use, and complete with all the boat repair supplies you need. Specific kits include the Fiberglass Boat Repair Kit (105-K), perfect for hull and deck repairs, which includes 105 Resin, 205 Hardener, fiberglass cloth, and tools to restore strength and watertight integrity, as well as dedicated kits for aluminum and plastic hulls.
Why Serious Builders Choose WEST SYSTEM
West System Epoxy forms strong, load-bearing bonds that often exceed the strength of the surrounding material, and precisely formulated resin and hardener options allow for customizable mixing to ensure optimal performance for every project. The system's compatibility is equally impressive — West System marine epoxy works with fiberglass, Kevlar, and carbon fiber for superior structural integrity. Whether you're restoring a wooden hull, treating dry rot, re-planking, completing deck work, or simply installing hardware, WEST SYSTEM provides an excellent moisture barrier to reduce maintenance and extend service life.