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West System 422 Barrier Coat Additive

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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