BARRIER COAT ADDITIVE

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A proprietary blend designed to improve cured epoxy’s moisture exclusion effectiveness. Helps to prevent gelcoat blistering in polyester fiberglass boat bulls. Also, it increases t he epoxy’s abrasion resistance. 422 cures to a light gray color. Add to mixed resin/hardener at the rate of 15 to 20% by volume per 8 fl oz of epoxy. 16 oz can of 422 will modify approximately half a gallon of mixed epoxy. Show more