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West System 42216 Barrier Coat Additive for Epoxy Moisture Protection

Manufacturer

West Systems

<p>Founded in 1969 by brothers Meade, Joel, and Jan Gougeon in Bay City, Michigan, West System emerged from a shared passion for building sailboats and iceboats. What began as experiments with epoxy technology in the late 1950s evolved into a collaboration with chemists at Dow Chemical Company's epoxy lab, resulting in formulations that could serve as both adhesive and coating. The formulations developed became the basis of the WEST SYSTEM group of products introduced in 1971, revolutionizing wooden boat construction and marine bonding applications.</p><h3>Pioneering Marine Epoxy Technology</h3><p>West System Epoxy was created by Gougeon Brothers—sailors, builders and formulators who know the engineering and chemistry required for high-performance composite structures. In 1970, the brothers launched Adagio, the first large, all epoxy bonded and sealed wooden boat built without the use of fasteners, demonstrating the structural integrity their epoxy formulations could achieve. For over 50 years, WEST SYSTEM epoxy has been the marine industry's trusted brand for versatile, high-quality epoxy resin systems, expanding from marine applications to woodworking, composite construction, and general repair.</p><h3>Comprehensive Product Lineup</h3><p>The company's signature <a href="/7644-west-systems-west-system-products-201176">West System Products</a> include their renowned two-part epoxy systems featuring 105 Epoxy Resin paired with specialized hardeners, fillers, and additives. West System Epoxy is a versatile, high-quality, two-part epoxy easily modified for a wide range of coating and adhesive applications, especially suited for marine applications requiring superior moisture resistance and high strength. The modular system allows users to customize working time, cure characteristics, and physical properties by selecting different hardeners and incorporating various fillers for specific bonding, fairing, or filleting applications.</p><p>Beyond traditional epoxy resins, West System offers specialized solutions like <a href="/7644-west-systems-vinyl-sealant-repair-kit-19328">Vinyl Sealant Repair Kits</a> designed for quick repairs and sealing applications. The brand also provides an extensive selection of <a href="/7644-west-systems-maintenance-parts-accessories-200647">Maintenance Parts & Accessories</a> including metering pumps, mixing pots, application tools, and roller covers specifically engineered for epoxy work.</p><h3>Engineering Excellence and Quality Standards</h3><p>Not all epoxies are created equal—epoxy brands can vary widely in formulations, quality of raw materials, and suitability for marine environments, and it's much more difficult to balance all of the physical and mechanical properties necessary for a versatile, high-quality marine epoxy. West System epoxies are marine-grade and undergo rigorous testing to ensure their strength, making them suitable for applications ranging from boat building and repair to composite construction, woodworking, and structural bonding in demanding environments.</p><p>As an employee-owned, family run organization operating since 1969, West System maintains the same commitment to quality and innovation that drove the Gougeon brothers' original experiments. Their products bond tenaciously to wood, fiberglass, carbon fiber, metals, and many plastics, providing excellent moisture resistance and creating durable, long-lasting repairs and construction that withstand the harshest conditions.</p>

Part Number

42216
06/21/2036 12:11 PM
Sale Price

$56.16

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The West System 42216 Barrier Coat Additive is a proprietary blend formulated to enhance the moisture-exclusion properties of cured epoxy systems. This specialized additive creates a superior barrier coating that helps prevent gelcoat blistering on marine vessels and other applications where moisture infiltration is a concern.

Key Features:

  • Significantly improves epoxy's moisture-exclusion effectiveness
  • Increases abrasion resistance of cured epoxy surfaces
  • Provides excellent barrier coating protection against gelcoat blistering
  • Proprietary formulation designed specifically for marine epoxy systems
  • Compatible with West System epoxy resins for optimal performance

This additive is ideal for boat owners and marine professionals seeking to create a durable, moisture-resistant barrier coating. When mixed with West System epoxy resin, the 42216 additive enhances the protective qualities of the coating system, extending the life of fiberglass hulls and other composite structures exposed to wet environments.

Products specifications

Type

Barrier Coat

Pretty easy

In all I'm very happy with how the product works and the delivery time and communication from Autoplicity

Which the pic represented actual item. Had to check other sites to compare the item # and make sure I was ordering the right thing.

Very easy

Product was as described and delivered on time. Good pricing as well!

Not to happy ,I coudn't find my model truck , I'v got a Dodge Dakota pickup truck. I just hope what I ordered fits!

Ok so far

Not much to say, the price was good and the speed of delivery was excellent.

Quick and great prices

simple transaction

Good

please don't show price on packing slip

Quick and easy

Easy ordering and checkout

Great Prices and great communication. I received notification as soon as I made the order, and when it was shipped out, along with a Tracking number. They were very quick to mail it out too.<br><br>Thanks<br><br>Order number 13029

first order fast shipping and great fit

found what needed

Great fast quality service. O high recommend shopping with autoplicity .. Two thumbs up !!!

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