---
product_id: 374961862
title: "West System G/FLEX EPOXY QT KIT"
brand: "west system"
price: "$473.41"
currency: USD
in_stock: true
reviews_count: 5
category: "West System"
url: https://www.desertcart.ec/products/374961862-west-system-g-flex-epoxy-qt-kit
store_origin: EC
region: Ecuador
---

# Waterproof & bonds damp surfaces 46 min pot life 150,000 PSI elasticity West System G/FLEX EPOXY QT KIT

**Brand:** west system
**Price:** $473.41
**Availability:** ✅ In Stock

## Summary

> 🔧 Tough bonds that flex with your lifestyle — never settle for less!

## Quick Answers

- **What is this?** West System G/FLEX EPOXY QT KIT by west system
- **How much does it cost?** $473.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/374961862-west-system-g-flex-epoxy-qt-kit)

## 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

- • **Structural Strength:** Absorbs shock, vibration & expansion stress without cracking
- • **Customizable Formula:** Modify with fillers & additives to tailor toughness & finish
- • **Extended Working Time:** 60-75 minutes open time for precision and control
- • **Unmatched Versatility:** Bonds fiberglass, metals, plastics & tough woods with ease
- • **Waterproof & Flexible:** Perfect for damp, underwater, or challenging repairs

## Overview

West System G/FLEX Epoxy QT Kit is a premium, toughened 2-part epoxy designed for permanent, waterproof bonding of diverse materials including fiberglass, metals, plastics, and difficult woods. With a 1:1 mix ratio, it offers a generous 46-minute pot life and cures to a flexible yet strong bond with a modulus of elasticity of 150,000 PSI. Ideal for structural repairs that endure shock, vibration, and moisture, it’s easily customized with fillers and additives, making it the go-to epoxy for professionals and DIYers demanding durability and versatility.

## Description

G/flex 650 is a toughened, versatile, liquid epoxy for permanent waterproof bonding of fiberglass, ceramics, metals, plastics, damp and difficult-to-bond woods. With a modulus of elasticity of 150,000 PSI, it is a bit more flexible than standard epoxies and polyester, but much stiffer than adhesive sealants. This gives it the ability to make structural bonds that can absorb the stress of expansion, contraction, shock, and vibration. It is ideal for bonding dissimilar materials. It can be modified with WEST SYSTEM fillers and additives and used to wet-out fiberglass tapes and fabrics. 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 and a workable cure in 7-10 hours.

Review: This is the strongest adhesive I've found for most substrates (the exception being low surface energy plastics). With good surface preparation, I've had excellent results on aluminum, steel, stainless steel, carbon fiber, fiberglass, wood, and many plastics. I did some tests against 3M DP420, the gold standard of toughened epoxies, and this had better shear strength (despite being much less expensive). I've tried acrylic, urethane, and CA adhesives; none matched the strength and toughness of this. This is NOT a quick-dry epoxy. It doesn't even start to harden for a few hours. I always let it dry overnight before using what I've glued with it. It seems to reach almost full strength about as fast as 30-minute epoxies, but it has a much longer working time. Ideally, plan a day ahead. It's a little harder to use than dual-syringe epoxies, of course. If measuring volume is too difficult (say you only need a small amount), you can always weigh the components. The resin is much heavier (about 1.2X), so be sure to account for that. For example, tare your scale, add 2g of hardener, and then add 2.4g of resin.
Review: This product is amazing. It is much more flexible, then traditional epoxy does require a bit more effort to sand but. Gives a great nice finish and sticks to anything. Would definitely buy again

## Features

- EXCELLENT ADHESION to hard-to bond woods. This toughened, versatile liquid epoxy 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. It can be modified with WEST SYSTEM fillers and additives and used to wet-out fiberglass tapes and fabrics. 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 and a workable cure in 7-10 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. 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 aluminum and boats and canoes or kayaks made of polyethylene or ABS.
- EASILY MODIFIED with WEST SYSTEM Fillers, Additives, and Pigments to suit the job at hand. Adding G/flex to other WEST SYSTEM epoxies can improve their toughness and flexibility. Not intended for clear coating.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002PKLO80 |
| Best Sellers Rank | #115,667 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #493 in Cyanoacrylate Adhesives |
| Item model number | 650-32 |
| Manufacturer | Gougeon Brothers, Inc. |
| Product Dimensions | 5.08 x 5.08 x 5.08 cm; 1.02 kg |

## Product Details

- **Brand:** West System
- **Item form:** Liquid
- **Material:** Polyester
- **Special features:** Highly Versatile, Strong Underwater Adhesion, Extreme Bonding Capabilities
- **Specific uses for product:** Repair, Woodworking, Carpentry

## Images

![West System G/FLEX EPOXY QT KIT - Image 1](https://m.media-amazon.com/images/I/81PnSpWX6UL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***. on 5 March 2024*

This is the strongest adhesive I've found for most substrates (the exception being low surface energy plastics). With good surface preparation, I've had excellent results on aluminum, steel, stainless steel, carbon fiber, fiberglass, wood, and many plastics. I did some tests against 3M DP420, the gold standard of toughened epoxies, and this had better shear strength (despite being much less expensive). I've tried acrylic, urethane, and CA adhesives; none matched the strength and toughness of this. This is NOT a quick-dry epoxy. It doesn't even start to harden for a few hours. I always let it dry overnight before using what I've glued with it. It seems to reach almost full strength about as fast as 30-minute epoxies, but it has a much longer working time. Ideally, plan a day ahead. It's a little harder to use than dual-syringe epoxies, of course. If measuring volume is too difficult (say you only need a small amount), you can always weigh the components. The resin is much heavier (about 1.2X), so be sure to account for that. For example, tare your scale, add 2g of hardener, and then add 2.4g of resin.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 12 July 2025*

This product is amazing. It is much more flexible, then traditional epoxy does require a bit more effort to sand but. Gives a great nice finish and sticks to anything. Would definitely buy again

### ⭐⭐⭐⭐⭐ Review
*by N***Y on 23 June 2024*

It's the easiest two part high tensile epoxy I've used. Mixes to a honey-like texture and flow. Gives you a solid 35 minute work time, probably longer in cooler climates. I used it to install two 40" (4" x 2") kevlar felt canoe skid plates. Used about 100 grams (50 gr of each) per skid. Lots more product still in the bottles. Wets the fabric thoroughly, smoothes out nicely. Cured in 60 minutes in the local 108 degree heat. Sands easily. Do yourself a favor.

## Frequently Bought Together

- G/FLEX EPOXY QT KIT
- The Felt Store Kevlar® Felt Skid Plates for Canoes - Excellent Cut & Abrasion Resistance, Protect Bow & Stern, Kayak Accessory for Canoe & Boat Protection, 2 Pieces
- Kevlar Felt - 1 Yard - 36 Inches by 40 Inches - Used for Canoe Kayak to Protect Boat Bottoms from Rocks, Oysters, Sand, and virtually Any Object That Would Normally Puncture The Bottom - 3.5 Ounce

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-07*