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"Gougeon Brothers, Inc. the company that manufactures West System® Epoxy, is an employee-owned, family-run company located in Bay City, Michigan. Gougeon Brothers, Inc. is ISO 9001:2015 registered.

Brothers Meade and Jan Gougeon opened shop at this location in 1969, building iceboats and light, fast sailboats with wood and their proprietary epoxy formula. By 1971, they were selling West System Epoxy to other boat builders and individuals who wanted to construct or repair their own boats with it. Since epoxy was new in the boating world, the Gougeons found themselves dispensing a lot of how-to advice right along with their cans of epoxy resin and hardeners.

With a bit of refining, that’s pretty much what we’re still doing nearly five decades later. Although West System products are now distributed worldwide and sold through full-service retailers, we continue to stay in close contact with our customers. Much of the extensive epoxy research and development in the Gougeon test lab is driven by the needs of our West System customers. Our full-time technical staff fields thousands of inquiries annually."

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West System 407-15 Low-Density, 12 oz is a blended microballoon-based fairing filler for WEST SYSTEM Epoxy. Add 407 to a mixture of epoxy resin/hardener to create a fairing putty. It’s easy to sand or carve this putty once it has cured. The filler is reasonably strong on a strength-to-weight basis. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive. Blended with epoxy to a “peanut butter” consistency, it will be easy to fair. The higher the percentage of 407 in your epoxy mix, the easier it will be to fair. Cures to a dark red/brown color.

West System 407-15 Low-Density, 12 oz

West System 403-B Microfibers, 20 lb is a fine fiber blend. Use it to thicken epoxy blended resin/hardener and create a multi-purpose adhesive. It’s most popular use is for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities but will still do an excellent job of wetting-out/penetrating into wood fibers. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive. Blended with epoxy, it will cure to an off-white color.

West System 403-B Microfibers, 20 lb

West System 410-B Microlight, 4 lb is the ideal low-density filler for creating a light, easily-worked fairing compound especially suited for fairing large areas. Microlight mixes with greater ease than 407 Low-Density filler or microballoons and is approximately 30% easier to sand. It feathers to a fine edge and is also more economical for large fairing jobs. Not recommended under dark paint or other surfaces subject to high temperatures. Cures to a tan color. When West System® epoxy is thickened to a peanut butter consistency with Microlight™, the cured product sands and carves like basswood.

West System 410-B Microlight, 4 lb

West System 405 Fileting Blend is a strong, wood-toned epoxy filler. Add it to your epoxy mix when making epoxy joints and filets on naturally finished wood. It mixes easily with epoxy. This product helps you create smooth filets that will need only a little sanding. Its color is a consistent brown. 405 Fileting Blend can be blended with other WEST SYSTEM Fillers to modify the shade of your epoxy mix. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive.

West System 405 Filleting Blend

West System 403-28 Microfibers, 20 oz is a fine fiber blend. Use it to thicken epoxy blended resin/hardener and create a multi-purpose adhesive. It’s most popular use is for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities but will still do an excellent job of wetting-out/penetrating into wood fibers. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive. Blended with epoxy, it will cure to an off-white color.

West System 403-28 Microfibers, 20 oz

West System 404-15 High-Density Adhesive Filler, 15.2 oz is an epoxy thickening additive. We developed it for maximum physical adhesive properties in hardware bonding, or anywhere that high-cyclic loads are anticipated. Blended with epoxy, it makes an excellent gap filler or structural filets. Use this filler wherever you need an especially strong bond. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive.

West System 404-15 High-Density Adhesive Filler, 15.2 oz

West System 404-45 High-Density Adhesive Filler, 43 oz is an epoxy thickening additive. We developed it for maximum physical adhesive properties in hardware bonding, or anywhere that high-cyclic loads are anticipated. Blended with epoxy, it makes an excellent gap filler or structural filets. Use this filler wherever you need an especially strong bond. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive.

West System 404-45 High-Density Adhesive Filler, 43 oz

West System 105 Epoxy Resin is the base material on which all WEST SYSTEM 105 System epoxy compounds are built. It is a clear, pale yellow, low-viscosity liquid epoxy resin. Blended with hardener at the proper ratio, it cures to a hard, solid plastic with superior physical properties. Based on which hardener you choose, it cures at a wide range of temperatures. Once cured, it forms a high-strength solid that is functionally waterproof, and highly resistant to moisture vapor. We designed 105 Epoxy Resin to wet out and bond with wood fiber, fiberglass, and reinforcing fabrics. It also bonds well with a variety of metals.

West System 105 Epoxy Resin

West System 403-9 Microfibers, 6 oz is a fine fiber blend. Use it to thicken epoxy blended resin/hardener and create a multi-purpose adhesive. It’s most popular use is for bonding wood. Epoxy thickened with microfibers has good gap-filling qualities but will still do an excellent job of wetting-out/penetrating into wood fibers. You can blend it into any WEST SYSTEM 105 Resin/20X Hardener combination, G/flex Epoxy 650, or G/5 Five-Minute Adhesive. Blended with epoxy, it will cure to an off-white color.

West System 403-9 Microfibers, 6 oz

West System

"Gougeon Brothers, Inc. the company that manufactures West System® Epoxy, is an employee-owned, family-run company located in Bay City, Michigan. Gougeon Brothers, Inc. is ISO 9001:2015 registered.

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405 Filleting Blend Safety Data Sheet

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