West 422 Barrier Coat Additive 16 oz.

Binnacle.com #:  39039
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West 422 Barrier Coat Additive 16 oz.

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Designed to improve cured epoxy's moisture-exclusion effectiveness. Used as a barrier coating additive to prevent gelcoat blistering in polyester fiberglass boat hulls.
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Binnacle.com:   #39039
MFG Part#:   422-16
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West 422 Barrier Coat Additive 16 Ounce 422-16


Additives are blended with mixed epoxy to alter the physical properties of the epoxy when used as a coating. Additives can be used to alter the color, abrasion resistance or moisture resistance of cured epoxy.

A proprietary blend designed to improve cured epoxy's moisture-exclusion effectiveness, West System 422 is used as a barrier coating additive to help prevent gelcoat blistering in polyester fiberglass boat hulls. West 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% by volume, or 3 tablespoons per 8 fl oz. of epoxy. 

Sixteen ounce can of West 422 will modify approximately half a gallon of epoxy.


  West System User Manual 2015

  West 422 MSDS
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