West System 422 Barrier Coat Additive 500g

A proprietary blend designed to improve cured epoxy's moisture ~exclusion effectiveness.
422 is used as a barrier coating additive to help prevent gelcoat blistering.
422 also increases the epoxy's abrasion resistance.
Cures to a light gray color.
Add to mixed resin/hardener at the rate of 15 to 20 percent by weight, 3 tablespoons per 8 fl. oz. epoxy approximately 32 oz. per B group.