West Systems

About WEST SYSTEM Epoxy

Since 1969, WEST SYSTEM has been the benchmark for marine-grade epoxy technology. Founded and headquartered in Bay City, Michigan, the brand built its reputation in the demanding world of boat building and boat repair — environments where structural integrity and long-term moisture resistance are non-negotiable. Decades later, WEST SYSTEM remains the go-to choice for professional boatbuilders, marine repair technicians, and dedicated DIYers around the world.

At the heart of the brand is the legendary 105 System — a modular, field-proven approach to epoxy that gives users precise control over every aspect of a repair or build. The system centers on WEST SYSTEM Epoxy Products, which pair the 105 Epoxy Resin with a selection of hardeners, each engineered for different working conditions and cure speeds. Whether you need a fast-setting compound for a quick on-the-water fix or a slow-curing formulation for a complex laminating job in warm weather, there is a hardener designed for the task.

WEST SYSTEM Epoxy Adhesives take that same foundation and extend it into high-strength structural bonding. These formulations are compatible with wood, fiberglass, Kevlar, carbon fiber, metals, and ceramics — making them equally at home in a marine boatyard, a woodworking shop, or a composite fabrication facility. WEST SYSTEM epoxy forms strong, load-bearing bonds that often exceed the strength of the surrounding material , which is why builders trust it for everything from hull construction to bulkhead installation.

Rounding out the system, WEST SYSTEM Fillers allow users to fine-tune the physical characteristics of a mixed epoxy batch. Users can adjust the epoxy with one of six WEST SYSTEM fillers, or add one of several additives to create specific coating properties. Options range from low-density fairing compounds ideal for creating smooth, sandable surfaces, to high-density microfiber blends engineered for structural glue joints and filleting work.

Why WEST SYSTEM Stands Apart

• Modular versatility: WEST SYSTEM Epoxy products make up a versatile epoxy system that can be used for everything from basic, long-lasting, marine epoxy repairs to the construction of high-performance composites.
• Moisture resistance: Designed to create a protective barrier, WEST SYSTEM epoxy prevents water infiltration, ensuring long-term durability in marine environments.
• Broad material compatibility: WEST SYSTEM marine epoxy is compatible with various materials, including fiberglass, Kevlar, and carbon fiber, for superior structural integrity.
• User-focused design: WEST SYSTEM 105 Epoxy Resin, Hardeners, Fillers, Additives, and Materials are designed and developed with the end-user in mind.

Whether you are restoring a classic wooden sailboat, cold-molding a new hull, patching a delaminating deck, or fabricating a custom composite component, WEST SYSTEM provides the engineered materials and the technical guidance to get the job done right the first time.