WEST System Barrier Coat, 422 additive
WEST System West System
  • WEST System Barrier Coat, 422 additive

WEST System Barrier Coat

WEST SYSTEM 422 Barrier Coat Additive is 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% by weight-3 tablespoons per 8 fl. oz. epoxy (approximately 32 oz. per B group).
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$26.26 / ea
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Tech Spec Product Info User Generated Content
Moisture Resistance- Apply 422 Barrier Coat as undercoats of epoxy modified for maximum moisture protection
Material: Epoxy
Type: Additives
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by PowerReviews
WEST System Barrier Coat

(based on 1 review)

Ratings Distribution

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Reviewed by 1 customer

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(1 of 3 customers found this review helpful)


Just what I needed

By Will

from Cape Cod

About Me Recreational

Verified Reviewer


  • Easy to Use
  • Visually Pleasing


  • Thickened the epoxy

Best Uses

  • Outdoor
  • Quick Fix

Comments about WEST System Barrier Coat:

I needed to protect a few small areas of fiberglass on the inside of an old dinghy that had been degraded from years of sun exposure. This product seemed like a cost effective solution since I already had the epoxy.

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