--- product_id: 28713903 title: "655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White" brand: "west system" price: "€ 93.59" currency: EUR in_stock: true reviews_count: 8 category: "West System" url: https://www.desertcart.be/products/28713903-655-8-g-flex-epoxy-adhesive-two-4-5-fl store_origin: BE region: Belgium --- # 46 min pot life, 24 hr full cure Waterproof & bonds damp surfaces 150,000 PSI tensile strength 655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White **Brand:** west system **Price:** € 93.59 **Availability:** ✅ In Stock ## Summary > 🛠️ Fix it once, fix it right — the epoxy that sticks with you! ## Quick Answers - **What is this?** 655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White by west system - **How much does it cost?** € 93.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/28713903-655-8-g-flex-epoxy-adhesive-two-4-5-fl) ## Best For - west system enthusiasts ## Why This Product - Trusted west system brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Extended Working Time:** 46 minutes pot life and up to 75 minutes open time for precision application. - • **Versatile Bonding Power:** Bonds hard-to-stick materials like polyethylene, metals, fiberglass & ceramics effortlessly. - • **Waterproof & Weatherproof:** Perfect for wet, damp, or even underwater repairs—no compromise on durability. - • **Unmatched Structural Strength:** Withstands expansion, contraction, shock & vibration for lasting repairs. - • **Thickened Formula for Vertical Use:** Ideal for overhead or vertical surfaces without sagging or dripping. ## Overview West System 655-8 G/flex Epoxy Adhesive is a high-strength, waterproof two-part epoxy designed for permanent bonding of challenging materials including damp woods, plastics, metals, and fiberglass. Featuring a toughened, flexible formula with a tensile strength of 150,000 PSI, it offers a generous 46-minute pot life and cures fully in 24 hours, making it the go-to solution for durable, stress-absorbing repairs in demanding environments. ## Description West System 655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White Review: Amazing! Misleading color though. - Great and super tough epoxy that saved our rotomolded hot tub spa from 2 hairline cracks that began leaking considerably. Was relatively easy to apply. Steps followed: - drill a 1/16th or 1/8th bit hole straight through the end of each crack. - dig out an 1/8th inch deep and wide U or V shaped trench between the holes with a dremel tool, be very careful to not punch all the way through here or weaken it too much if possible. Very high speeds/friction may start to melt the material, this is fine but slow down if this happens. - sand down the edges of the trench so that they aren’t too sharp. You ideally need a gradual edge groove to adhere better - heat treat both trenches. Basically just blast them for a few seconds with quick passes with a blowtorch, strong butane lighter, or a brûlée torch. Do not overdo this - apply the resin on relatively thickly, don’t go too crazy with it. Enough to fill the trench throughly and then a little over the edges to form a solid seal - optionally you can sand this down after for a cleaner finish or if your application was a little sloppy. My one complaint, which is enough to bring this down to a 4, but I’ve decided not to simply due to the unique value and quality of this product. The title listing says white, but the cured end result is a tree-sap translucent gold-yellow (as seen in one of the images). This is notable if you’re concerned about the visual end result in a high visibility area. Review: West is the Best - Arrived on time and in good order. West system products are the best epoxy in my opinion after having done several fiberglass repairs on boat. This G flex 655 is great for overhead and vertical surfaces because it's the thickened version. Used on a polyethylene RV holding tank along with fiberglass mat. Very easy to mix and use the 655. the key to any successful repair is surface preparation. Drill end of all cracks, 60 grit sand, quick acetone wipe, flame treat the plastic then epoxy. West system has awesome tech support if needed. The tubes went farther than expected after repairing a 1/2" x 2" hole with multiple cracks still have some left. ## Features - EXCELLENT ADHESION adhesion to hard-to bond woods. This toughened, versatile, thickened epoxy is for permanent waterproof bonding of fiberglass, ceramics, metals, plastics, damp and difficult-to-bond woods. A bit more flexible than standard epoxies and polyester, but much stiffer than adhesive sealants. Makes structural bonds that can absorb the stress of expansion, contraction, shock, and vibration. - IDEAL FOR BONDING dissimilar materials. Mixed at a 1:1 ratio, this 2-part epoxy gives you 46 minutes of pot life at 72°F and an open (working) time of 60-75 minutes. It reaches an initial cure in 3 to 4 hrs, workable cure in 7-10 hours, and full cure in 24 hours. - OFFERS GREATER FLEXIBILITY than traditional epoxies or polyester resins. Yet it is much stiffer than adhesive sealants. With a modulus of elasticity of 150,000 PSI, this epoxy bonds tenaciously to a metals, plastics, glass, masonry, and fiberglass. - BONDS MANY MATERIALS including dissimilar ones. G/flex has a superior grip so that it can be used to bond to metals, plastics, glass, masonry, and fiberglass. G/flex is ideal for repairs to aluminum boats and polyethylene and ABS canoes and kayaks. It can also be used to wet out and bond fiberglass tapes and fabrics. - MAKES STRUCTURAL BONDS that can absorb the stress of expansion, contraction, shock, and vibration. G/flex can be used on damp or wet surfaces, and even underwater when applied with specific techniques. Perfect for repairs to plastic boats, canoes or kayaks made of polyethylene or ABS. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LWKFZJ8 | | Best Sellers Rank | #11,133 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Electrically Conductive Adhesives | | Brand | West System | | Brand Name | West System | | Color | White | | Compatible Material | Plastic | | Container Type | Tube | | Customer Reviews | 4.7 out of 5 stars 634 Reviews | | Full Cure Time | 24 hours | | Global Trade Identification Number | 00811343014759 | | Included Components | EMW1832294 | | Item Form | Liquid | | Item Package Quantity | 1 | | Item Type Name | Industrial Fluid Adhesives & Sealants | | Manufacturer | West Systems | | Material | epoxy | | Material Type | epoxy | | Model | 655-8 | | Number of Pieces | 2 | | Other Special Features of the Product | Waterproof | | Part Number | 655-8 | | Special Feature | Waterproof | | Specific Uses For Product | Repair, Woodworking | | Tensile Strength | 150000 psi | | UPC | 811343014759 | | Unit Count | 9 Fluid Ounces | | Viscosity Level | High | | Volume | 9 fluid ounces | | Warranty Description | EMW1832294 | | Water Resistance Level | Waterproof | ## Product Details - **Brand:** West System - **Item Form:** Liquid - **Material:** epoxy - **Special Feature:** Waterproof - **Specific Uses For Product:** Repair, Woodworking ## Images ![655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White - Image 1](https://m.media-amazon.com/images/I/61QmaCoW1PL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Will this epoxy work on plastic fuel tanks?** A: Yes, absolutely. We've used it on pressurized fuel tanks too. Fixed punctures, even cracked threaded connection collars. This is the best epoxy we've ever seen. The key is all in the prep work, using 80 grit as instructed. Once the plastic is sanded and prepped, for added strength it advises "curing" the plastic before applying epoxy by heating that sanded plastic area with a torch (flame). Clearly this step can be dangerous, do only if it's an empty aired out tank. Otherwise skip this step. Prep, prep, prep is the key. **Q: does it work with wood?** A: Yes, but the regular epoxy works very well with wood and is less expensive. I bonded plastic to wood with this. **Q: Will this epoxy work on cement steps** A: Not sure how you're proposing to use it exactly, but it's a great product and will work on virtually anything. **Q: What type of prep work is needed if i'm using this on a scepter water jug? light sanding? i'm trying to glue an abs 6x12" plate to it the jug.** A: Sanding for "Tooth" and then a "Degreasing " on Both Items (jug & base) I use denatured alcohol. I'd lay the Jug Base down into the Gflex and let simple gravity do the joining. Hope this helps ## Customer Reviews ### ⭐⭐⭐⭐⭐ Amazing! Misleading color though. *by C***F on July 20, 2026* Great and super tough epoxy that saved our rotomolded hot tub spa from 2 hairline cracks that began leaking considerably. Was relatively easy to apply. Steps followed: - drill a 1/16th or 1/8th bit hole straight through the end of each crack. - dig out an 1/8th inch deep and wide U or V shaped trench between the holes with a dremel tool, be very careful to not punch all the way through here or weaken it too much if possible. Very high speeds/friction may start to melt the material, this is fine but slow down if this happens. - sand down the edges of the trench so that they aren’t too sharp. You ideally need a gradual edge groove to adhere better - heat treat both trenches. Basically just blast them for a few seconds with quick passes with a blowtorch, strong butane lighter, or a brûlée torch. Do not overdo this - apply the resin on relatively thickly, don’t go too crazy with it. Enough to fill the trench throughly and then a little over the edges to form a solid seal - optionally you can sand this down after for a cleaner finish or if your application was a little sloppy. My one complaint, which is enough to bring this down to a 4, but I’ve decided not to simply due to the unique value and quality of this product. The title listing says white, but the cured end result is a tree-sap translucent gold-yellow (as seen in one of the images). This is notable if you’re concerned about the visual end result in a high visibility area. ### ⭐⭐⭐⭐⭐ West is the Best *by F***K on June 7, 2026* Arrived on time and in good order. West system products are the best epoxy in my opinion after having done several fiberglass repairs on boat. This G flex 655 is great for overhead and vertical surfaces because it's the thickened version. Used on a polyethylene RV holding tank along with fiberglass mat. Very easy to mix and use the 655. the key to any successful repair is surface preparation. Drill end of all cracks, 60 grit sand, quick acetone wipe, flame treat the plastic then epoxy. West system has awesome tech support if needed. The tubes went farther than expected after repairing a 1/2" x 2" hole with multiple cracks still have some left. ### ⭐⭐⭐⭐⭐ Fixed my rv Black tank! *by P***Z on May 16, 2026* I bought a trailer and found there was a crack in the black tank, desperate to not replace the black tank I spent hours researching. I stumbled upon this product, after seeing a guy use this who put a jack through his black tank and patched much more severe damage than mine, I decided to pull the trigger. The difficult thing about my tank is it is polyethylene, which many products don't adhere to. This will work on both abs and polyurethane. MAKE SURE YOU READ THE INSTRUCTIONS. I cleaned the outside of the tank with you isopropyl alcohol multiple times using paper towels as recommended (rags may have softener which will affect its ability to stick), flushed the black tank multiple times, sanded with 80 grit sand paper everywhere I was going to apply, I then cleaned with more alcohol. Then the important step for polyethylene, flame treat the plastic, which is just running fire quickly over the surface, not melting the surface but chemically changing the surface. I then applied a thick layer in the crack, getting as much in as possible. I spread it wider placed some fiberglass mesh in it. Here is where I "messed up", after the first layer I thought it was a good idea to wait a day to apply the second layer. That night after googling and going to their website, they recommended thick layers, which generate heat and help it to cure. They also recommend waiting 3 to 4 hours only before applying the second layer (push your thumb into it, if it is still soft, but doesn't stick to you, you're good to apply the second layer. So after waiting two days, I had to 80 grit sand the epoxy , clean with alcohol again, flame treat and then apply the second layer. After letting it cure for a few days I put 30 gallons in to test the patch. Not a drop. Time will tell how it will hold up with movement and flex, but I'm pretty confident I'm good for quite a while. ## Frequently Bought Together - West System 655-8 G/flex Epoxy Adhesive, two 4.5 fl oz., White - WEST SYSTEM G/flex Epoxy (2- 4oz) - G/Flex 655-1 1 oz syringe --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/28713903-655-8-g-flex-epoxy-adhesive-two-4-5-fl](https://www.desertcart.be/products/28713903-655-8-g-flex-epoxy-adhesive-two-4-5-fl) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-08-11*