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🔧 Bond Boldly, Repair Reliably — The Last Epoxy You'll Ever Need!
West System G/Flex 655-1 is a premium, toughened two-part epoxy adhesive designed for permanent, waterproof bonding across plastics, metals, fiberglass, ceramics, and damp woods. With a high modulus of elasticity (150,000 PSI), it absorbs movement and impact stress, making it perfect for structural repairs and marine applications. The thickened formula fills gaps and bonds uneven surfaces without sagging, while the convenient 1 oz syringe ensures precise, easy application. Fully cures in 24 hours, delivering durable, flexible, and reliable bonds that outperform traditional adhesives.





| ASIN | B08H8J4MCJ |
| Best Sellers Rank | #5,253 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Metal Filled Epoxies |
| Brand | West System |
| Brand Name | West System |
| Color | No Color |
| Compatible Material | Plastic |
| Container Type | Syringe |
| Customer Reviews | 4.8 out of 5 stars 248 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 |
| Number of Pieces | 1 |
| Other Special Features of the Product | Waterproof |
| Part Number | 655-1 |
| Special Feature | Waterproof |
| Specific Uses For Product | Casting, Countertop, Flooring, Masonry, Repair |
| UPC | 850017278158 |
| Unit Count | 1 Count |
| Viscosity Level | High |
| Volume | 1 fluid ounces |
| Warranty Description | Warranty |
| Water Resistance Level | Waterproof |
N**E
Awesome!!!
This worked perfectly for my needs. Easy to extrude the amount you need and mix. It dried crystal clear. Be patient - you may need to hold things in place for a bit until it begins to set. Allow the full 24 hrs to set before touching. I attached 2 side handles to a large water tank to help me lift it when full. Those handles are attached so securely, they are never coming off. 100% satisfied.
D**R
One of the best epoxies money can buy.
Works very well on multiple materials. Just like the name suggests, it is slightly flexible. Which is much better than being brittle for multiple applications. Dries a light transparent yellow. Can decrease cure time by heating, but this will also decrease the durability of the cured adhesive.
A**R
Repaired split wood on my couch, and performed beautifully!
I was worried when it arrived and said it was for use on plastics, but decided to give it a go anyway to repair the split wood on my couch. I mixed it with the tiniest amount of Eye Candy coloring in a bowl and used a toothpick to carefully place it into the widened crack and knot. I clamped it all together and used painters tape to ensure nothing could drip through the bottom. Then I used a dry paper towel to very carefully wipe all the excess from the wood around the crack. It left a small amount of residue. After a couple of hours I took a paper towel and some rubbing alcohol and removed the residue that remained around the crack, being careful to work fast and not be overly aggressive so as not to remove the original finish on the wood. I let it cure for 24 hours and unclamped everything, and ventured a sit! It's been a week of regular use by 4 adults now and that foot long crack is nearly invisible and is holding perfectly. Tips: 1) This shrinks SLIGHTLY as it dries. You may want to leave the slightest mound on whatever you are filling if you don't want a valley. 2) Cover everything in painters tape (wood, clamps, etc) if you want to be able to pop them loose. Otherwise you may end up permanently attaching a new piece you didn't want. Amount: dispensed maybe 1/3 of the tube for this project. I had a minimal amount left over. The tubes were approximately the length of a hand.
P**T
Works on inflatable dinghy.
I had trouble trying to patch an inflatable dinghy because regular rubber cement was not sticking to exposed cloth under the rubber. I knew that I would have to use something else to stop the air leak and then patch over that. I sanded the area slightly then used the gflex. I'm very happy. For 11 dollars my problem is solved. I didn't even use a patch. It's holding up fine after a week of sun and rain. Inflatable dinghy owners need to get some today.
P**R
Good for small jobs. Minimal mess
Worked really well for a small job. Keeps mess to a minimum.
R**5
Great Product
Great stuff mixes easy
M**A
Great
Love it! Takes a while to harden but it’s worth it
T**O
Great Epoxy
Ready to use
A**X
Buena solución para la reparación de kayaks cuando no es posible soldar el plástico
Este producto está recomendado por la propia marca para sellar roturas en kayaks de HDPE. Incluso hay video de uno que partieron a la mitad, pegaron las 2 mitades con el producto...y aguantó pruebas muy agresivas sin despegarse. El mío tuvo una fisura en una zona difícil de soldar y al poner este producto quedó sellado sin que ingrese agua. Lo único que me falta corroborar es su duración, que espero sea de muchos años...si algo falla regresaré a actualizar mi reseña.
Trustpilot
1 day ago
2 days ago