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West System 105-A is the base resin of the West System two-part epoxy line, a low-viscosity, solvent-free epoxy that cures clear light amber. It is mixed with a hardener (205, 206, 207 or 209) to set working time and cure speed, and it bonds wood, fiberglass and metals. Boat builders and woodworkers value its thin, self-leveling film and its ability to be thickened with fillers for gap filling or fairing. It is a versatile coating and bonding resin rather than a one-bottle glue, so it needs a hardener and some measuring discipline.
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Lowest price we've seen: $59.99 on Nov 9 at West Marine. Tracked across 1 store since Nov 9.
Owners and builders treat 105-A as a dependable marine epoxy with predictable handling. They praise its wet-out and self-leveling, and note that results depend on mixing the right hardener and ratio.
West System 105-A is a low-viscosity, two-part epoxy resin. It cures to a clear, light amber color. It is free of volatile solvents, has a high flash point and gives off minimal odor.
The resin bonds wood, fiberglass and metals. Applied in several coats, it forms a moisture barrier and a base for paints and varnishes. Its thin-film properties give a smooth, self-leveling application without fish-eyeing.
Additives can be mixed in to adjust the epoxy for sag resistance, sandability or extra strength.