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  • West System 422 Barrier Coat Additive

    West System 422 Barrier Coat Additive is a proprietary blend designed to improve cured epoxy’s moisture exclusion effectiveness further. 422 is used as a barrier coating additive to help prevent gelcoat blistering in polyester fibreglass boats. 422 also increases the epoxy’s abrasion resistance. Add to any mixed WEST SYSTEM 105/200 Series Hardener combination.

    Project Uses

    Create an abrasion and moisture-resistant surface in:

    • Fibreglass Repairs
    • Gelcoat Blister Repairs
    • Boat Restoration
    • Rudder Restoration
    • Moisture Exclusion

    Product Specifications

    • Light Gray
    • Cures to Gray