Description
- 422B 3kg Barrier Coat Additive:A proprietary blend designed to improve the moisture exclusion effectiveness of WEST SYSTEM epoxy.
- 422 also increases the abrasion resistance and is an excellent additive for providing a barrier coating to help prevent gelcoat blistering.
- Add 20 to 25% by weight of 422 to the mixed epoxy.
- 422 Barrier Coat Additive Safety Data(pdf)
While WEST SYSTEM Epoxy creates an excellent moisture barrier by itself, 422 Barrier Coat Additive is a proprietary blend designed to further improve cured epoxys moisture exclusion effectiveness. 422 is used as a barrier coating additive to help prevent gelcoat blistering in polyester fiberglass boats. 422 also increases the epoxys abrasion resistance. Cures to a light gray color.
Add to mixed resin/hardener at the rate of 15 to 20% by volume or 3 tablespoons per 8 fl oz of epoxy. When using 300 Mini Pumps with 5:1 ratio epoxy mixtures, 10 strokes of 105 Resin and 10 strokes of 205 or 206 Hardener yields 8 fl oz. of epoxy; for 3:1 ratio epoxy mixtures, 9 strokes of 105 Resin and 9 strokes of 207 or 209 Hardener yields 8.1 fl oz. of epoxy.
A 16 oz can of 422 Barrier Coat Additive will modify approximately half a gallon of mixed epoxy.
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