West System Brand Qualifies for Free Shipping West System Barrier Coat Additive 16 oz #422-16

WEST SYSTEM Barrier Coat Additive 16 oz #422-16

$56.16

WEST SYSTEM Barrier Coat Additive 16 oz #422-16

$56.16

WEST SYSTEM Barrier Coat Additive 16 oz #422-16

$56.16

SKU: WSB-422-16

UPC: 811343011673

More about this item

WEST SYSTEM 422-16 Fiberglass & Repair

422 Barrier Coat Additive is a proprietary blend specifically designed to enhance epoxy's moisture-exclusion effectiveness, making it an essential component for creating professional-quality barrier coatings that prevent gelcoat blistering and protect hulls from water intrusion.

Superior Moisture Exclusion:

When added to WEST SYSTEM epoxy, 422 Barrier Coat Additive significantly improves the cured epoxy's ability to exclude moisture. This enhanced moisture barrier is critical for preventing osmotic blistering in fiberglass hulls and protecting the laminate from water-related degradation that can compromise structural integrity over time.

Prevents Gelcoat Blistering:

One of the primary uses of 422 is as a barrier coating additive to help prevent gelcoat blistering, a common problem in fiberglass boats where water penetrates the gelcoat and causes delamination and blister formation. The improved moisture barrier created by 422 stops water migration before it can cause damage.

Increased Abrasion Resistance:

Beyond moisture protection, 422 Barrier Coat Additive also increases the epoxy's abrasion resistance, creating a tougher, more durable coating that can withstand the wear and tear of marine environments, grounding, and general use.

Easy to Use:

Add 422 to mixed resin/hardener at a rate of 15-20% by weight—approximately 3 tablespoons per 8 fl oz of epoxy (or about 32 oz per B-size group). The additive blends easily into the epoxy mixture and cures to a light gray color, providing visual confirmation of proper barrier coat application.

Key Benefits:

  • Enhanced Moisture Barrier: Significantly improves moisture-exclusion effectiveness
  • Prevents Blistering: Helps stop gelcoat blister formation
  • Increased Abrasion Resistance: Creates tougher, more durable coating
  • Easy Mixing: Simple 15-20% by weight addition rate
  • Visual Confirmation: Cures to light gray color for easy identification
  • Professional Quality: Proprietary blend for reliable barrier coat performance

Common Applications:

  • Creating barrier coatings to prevent gelcoat blistering
  • Protecting fiberglass hulls from water intrusion
  • Treating existing blister problems
  • Applying protective coatings below the waterline
  • Any application requiring enhanced moisture exclusion
  • Increasing abrasion resistance of epoxy coatings

Mixing Guidelines:

  • Addition Rate: 15-20% by weight
  • Approximate Measure: 3 tablespoons per 8 fl oz epoxy
  • B-Size Group: Approximately 32 oz per B group
  • Cured Color: Light gray

This 16 oz container provides sufficient additive for creating professional-quality barrier coatings on medium-sized projects. Protect your hull investment with the proven moisture-exclusion performance of 422 Barrier Coat Additive.

Part Number: 422-16
UPC Code: 811343011673

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