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WEST SYSTEM Specialty Epoxies
These specialty epoxies add even more versatility to the WEST SYSTEM line of epoxies.
G/flex 655, now available in a convenient syringe
G/flex 655, now available in a convenient syringe
The G/flex 655-1 syringe dispenses resin and hardener at the correct 1:1 ratio.
G/flex is blended before application.
WEST SYSTEM Specialty Epoxies
Six10 Thickened Epoxy Adhesive
Six10 Thickened Epoxy Adhesive is a two-part epoxy with a consistency similar to gel toothpaste. We manufacture it under vacuum to prevent entrapped air bubbles. Our in-house chemists formulated this toughened system with 8% elongation. Conveniently, Six10 requires no hand mixing when used with a standard caulk gun and the static mixing wand that comes with each cartridge (pictured caulk gun not included). The self-metering coaxial cartridge dispenses a gap-filling, structural adhesive that bonds tenaciously to wood, metals, fiberglass, and concrete.
Six10 has a working time of over 40 minutes until the mixing wand becomes unusable. This adhesive has shear thinning properties, which means it moves more like a liquid when you work the material. This allows its use in cooler temperatures. You can also use it to wet out lightweight fiberglass cloth. It will cure in temperatures as low as 50°F (10°C).
G/flex Epoxies
G/flex is a two-part, toughened epoxy that can make structural bonds which absorb the stress of expansion, contraction, shock, and vibration. We formulated this system for high elongation with an ultimate elongation of around 30%. The increase in elongation and lower modulus (stiffness) that it provides equates to better adhesion to substrates. This helps it resist a peel or delamination from starting.
G/flex has a 1:1 mix ratio by volume for easy measuring. It’s also ideal for bonding dissimilar materials. We offer it in two versions. The liquid version, G/flex 650, has a consistency similar to honey. You can thicken it with 406 Colloidal Silica to reach the same viscosity as the 655. The pre-thickened version, G/flex 655, has a consistency like gel toothpaste. With proper application techniques, it will bond to wet/damp substrates and dense or oily woods like teak and oak.
G/5 Five-Minute Adhesive
G/5 Five-Minute Adhesive is a two-part adhesive that will cure to a gel state within minutes. It has a 1:1 mix ratio by volume. You can wet sand it about 30 minutes after application. It is ideal for a temporary, quick cure that’s convenient for some applications like fabricating a quick custom sanding block with some scrap fiberglass cloth and a piece of foam.
G/5 should not be used where high loads are expected or if it will be continually immersed in water.
WEST SYSTEM Epoxies
WEST SYSTEM offers high-quality epoxy resins, hardeners, fillers, and additives. Developed by our in-house chemists, our formulations are proprietary, structural, and marine grade. These epoxies have set the standard for epoxy quality in the marine industry and beyond since 1969.
An ISO 9001:2015 certified company
Founded in 1969, Gougeon Brothers, Inc. (GBI) formulates and manufactures WEST SYSTEM products. In 2020, NSF International recertified GBI's ISO 9001:2015 status, which ensures consistency in epoxy formulation, production, packaging, and instructional materials.
Fletcher
Reviewed in the United States on January 19, 2025
Sticks to anything. Used it to seal the bulkhead on my 16.5’ kayak front bulkhead. It is made of ABS plastic. This epoxy exceeded my expectations, was recommended by the reps at Hurricane kayaks. Easy to work with, dries hard as a rock but flexes with my boat. I use my kayak 50+ times a year. Worth every cent
Frank R Harrison
Reviewed in the United States on July 28, 2024
Great product. I used it to repair a crack in my 10 foot prowler boat. The crack was horizontal about 10” long including an inside and an outside bend. I watched a how to video on utube? Followed the step by step instructions and had the repair patch done in fifteen minutes. Let it dry for 24 hours and put it in the lake. Two of us fished out of it for two days. Worked great. I would highly recommend this product if you’re looking for a permanent patch for a abs plastic boat. This product is meant for underwater use.
C.P.
Reviewed in the United States on July 14, 2024
This worked great for patching a hole in my plastic canoe. The perfect consistency to soak in and work with fiberglass mat tape while still being viscous enough to stay where you want it as it's applied. Dried to a durable, solid yet flexible finish that bonded solidly to HDPE. If it wasn't quite so pricey it would be my epoxy adhesive of choice for anything I could use it with.
Ed
Reviewed in the United States on October 27, 2024
There's nothing quite like G-Flex. Waterproof permenent repairs on vertical surfaces with no drips. Glues, bonds and fills gaps on many different materials. I've used it on boats, kayaks, cars, home repair, wood, plastic and fibreglas. First quality.
PJ S.
Reviewed in the United States on May 8, 2023
Yet to know if it works, seems it will.
Mrebens
Reviewed in the United States on February 13, 2023
400 miles into a 2500 mile trip I noticed I had a leak in my black water tank and found a crack at the outlet that connects to the drain pipe. I tried other products and methods to repair with no success. I found the Gflex on Amazon and it worked amazing. I first let the tank drain - a slow, smelly drip into a bucket for a few days. Then followed the recommendation to try and get the adhesive into the crack to do an initial seal. I was able to flex the tank enough and used a meat injector to apply to both sides of the crack the best I could. I let that set up and then used Gflex and fiberglass cloth from a bondo repair kit (following the directions that came with the kit) to create multiple layers. The Gflex has the perfect consistency to achieve excellent results. Filled the tank with water - no leak. Drove a couple hundred miles - no leak. Took care of business - no leak. Due to the flexibility of the adhesive, and fixing the original problem that caused the crack (the factory forgot to install the bracket to support the drain pipe), I am sure this is a permanent and way less expensive fix than replacing the tank.
Matt
Reviewed in the United States on September 23, 2022
I've been using this to patch small cracks and spider cracks in the transom of my 1970's fiberglass boat. It's easy to mix up and thick enough to apply upside down on the bottom of the boat *without* having to let it set up (semi cure) or mix with fillers like sawdust to make "peanut butter". It's already thick enough (even in a hot Arizona garage) and sticky. I apply it with a plastic mixing stick after opening up the cracks with a dremel. It seems like the perfect toughness after curing. Not too brittle and not too flexible. It should flex with my old "wet noodle" hull and not crack again. It sticks to anything and self levels itself while applying to make a smooth repair. After curing it is so clear it looks like there is nothing in the cracks, which is funny.
rg
Reviewed in the United States on December 29, 2021
I have two scupper holes on my kayak that had cracked, and I even sleeved them with no luck. I watched several videos and everybody said the same thing. Use this stuff! Well, they were absolutely correct. All you have to do is make sure you mix it up evenly, then plaster the stuff on. I actually did not even worry about sending it afterwards because I was able to get it super smooth. I let it cure overnight, but it was curing very well after just a few hours. This stuff is rock hard, and I have had my kayak out at least a dozen times and not a drop of water. I actually verified that everything worked by filling up my whole kayak and not a single drop of water came out. This stuff works, and it is now with me all the time!
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