

💪 Seal it. Flex it. Fix it. Forever.
G/Flex 655-1 is a premium 2-part epoxy adhesive in a convenient 1 oz syringe, engineered for permanent, waterproof, and flexible bonds across plastics, metals, fiberglass, ceramics, and challenging woods. Designed to withstand stress from shock, vibration, and environmental changes, it’s the go-to solution for professional-grade repairs requiring durability and versatility.















| ASIN | B08H8J4MCJ |
| Best Sellers Rank | #8,942 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #17 in Metal Filled Epoxies |
| Brand | West System |
| Brand Name | West System |
| Color | No Color |
| Compatible Material | Plastic |
| Container Type | Syringe |
| Customer Reviews | 4.7 out of 5 stars 166 Reviews |
| Full Cure Time | 24 Hours |
| Item Form | Syringe |
| Item Package Quantity | 1 |
| Item Type Name | G/Flex 655-1 1 oz syringe |
| Manufacturer | Gougeon Brothers, Inc. |
| Material | Plastic |
| Material Type | Plastic |
| Model | 655-1 |
| Other Special Features of the Product | Waterproof |
| Special Feature | Waterproof |
| Specific Uses For Product | Casting, Countertop, Flooring, Masonry, Repair |
| UPC | 850017278158 |
| Unit Count | 1.0 Count |
| Viscosity | High |
| Volume | 1 Fluid Ounces |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |
J**D
An Awesome Epoxy that is strong, waterproof and flexible when cured!
The West Marine G-Flex Epoxy works well for the situations it is developed for. It is not a 5 minute set, which gives you time work with it. It is a strong epoxy that is waterproof and stays flexible once cured. Awesome for boat work, ski and snowboard repair etc. items that need waterproof and flexible qualities. It has worked well for the projects I purchased it for and I only use it for the repairs that require its properties. About 2x the price of regular epoxies.
L**A
Awesome for kayak keel guards!
Works just as indicated. I used it for a keel guard for my bonafide pwr129. Its better than Marine Goop. It was easy to mix and recap is nice on this, makes for no leakage
P**B
So far, so good!
So far, so good! Nothing sticks to polyethylene boat waste tanks the Google says. Practical experience with my favorite epoxy ( it uses the Godfather of soul’s initials) both marine and plastic formulas proved that true. Enter this stuff. I drilled a small at the end of the crack to prevent further propagation, and gooped it on. Tests on the dock and after reinstall, no leak. I will say my old boat is a floating condo, so no sea trial in store. Saved me $400 to $500 bucks.
K**R
Works good, as advertised.
WE have a much loved old bowling ball that was beginning to chip around the thumb hole. My adult son has disabilities and LOVES this ball. We tried an epoxy putty and then regular epoxy. Both cracked and chipped, but THIS epoxy really holds..It has set and the ball has been thrown down the alley a multitude of times with no cracking fissures or breakage. 5 stars!
W**M
Good product
Yep, it works on slick plastics that other products don't. It has a good work time allowing me to get the repairs just right yet set up rock hard in an hour or so. Dries amberish. Didn't try painting it since it's under the waterline on my bass buggy pond hopper.
B**O
Long Cure time.
Works well! Sticks to rotomolded HDPE well enough. I repaired my kayak in the field... but the problem is that this needs 24 hours to cure! If you have that kind of time, you will like this product. I will buy it again, even though I don't love the 24 hour cure time because it does work pretty well on plastic.
M**L
Outstanding Product for Plastic Boat Repairs
I used G/Flex to make field repairs on my expedition kayak. A lifesaver. The repair continues to serve.
S**4
Super product for patching a sit-on-top kayak
After 17 years, a repair that I made to the stern keel of my roto molded polyethylene kayak developed a fissure. Instead of using the original manufacturer’s polyethylene material again, I used this epoxy and am thrilled with the results! The small size of this product was perfect and the dual plungers made mixing the correct ratio easy. The epoxy was liquid enough to infiltrate all the small scrapes and after it hardened, I sanded the patch nice and smooth. I expect this patch to last even longer than the first one (knock on wood). ***Just be sure to follow the instructions and heat the plastic surface before applying it.***
Trustpilot
2 days ago
4 days ago