My Account
Shopping Cart

West System 73720 Biaxial Fiberglass Fabric 17 oz 50" x 20 Yards

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

73720
06/21/2036 2:43 PM
Sale Price

$775.00

4 left at this price

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The West System 73720 is a high-performance 17 oz. non-woven E-glass biaxial fabric designed for marine and composite reinforcement applications. This professional-grade fiberglass cloth features two layers oriented at ±45 degrees, held together with light stitching to create a stable, conformable fabric that drapes easily over complex curves and contours.

Key Features:

  • 17 oz. per square yard E-glass construction for excellent strength-to-weight ratio
  • ±45° biaxial fiber orientation provides superior shear strength and impact resistance
  • Non-crimped flat fibers deliver reduced print-through and smoother finish compared to woven fabrics
  • Higher stiffness-to-weight ratio than traditional woven cloth
  • Light stitching holds layers together while maintaining flexibility and drape
  • 50-inch width provides excellent coverage for large projects
  • 20-yard roll length for extended work without seams

Applications:

  • Structural repairs on boats, kayaks, and marine craft
  • Tabbing and bonding hull-to-deck joints
  • Reinforcing high-stress areas and attachment points
  • Composite lay-ups requiring directional strength
  • Strengthening panels, bulkheads, and structural components

The biaxial construction makes this fabric particularly effective for applications requiring torsional rigidity and resistance to twisting forces. The ±45° orientation aligns fibers to resist shear loads more effectively than 0°/90° fabrics, making it ideal for reinforcing areas subject to multi-directional stress. Compatible with epoxy, polyester, and vinylester resin systems.

Products specifications

Size

50" wide x 20 yd. roll

Fast good prices

make it work right and I'll be back!

Very fast on line, and best price

Great prices

Great prices and fast shipping!

The part description was off by a mile, however the part number and the item recieved were exactly what I wanted and orderd. shipped fast, got parts in two days. Finaly got e-mail that parts had shipped 7 days after I had received the order, just a little slow in that regard. As long as I get the parts I orderd and quick shipping, cudos to Autoplicity.

super easy checkout with amazon link! Let's you know if in stock or not, which is critical when ordering racing components.

Easy to use website, had the best price for the item I was looking for, and quick shipping! What else can you ask for?

The fact that you support paypal is why I chose you... and the fact you had lowest price... but lowest price doesn't guarantee a sale... paypal does!

Low price, quick shipping & confirmation of order.<br>

You are the best price.

Easy, would use again! Thanks, Fast Shipping!

Found the item I was looking for at Autoplicity for $20 cheaper than anywhere else. Shipping was also very quick.

Good availability

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy