Brand | West System |
---|---|
Material | Epoxy |
Compatible Material | Plastic |
Item Form | Liquid |
Color | Clear |
Item Package Quantity | 1 |
Package Information | Bottle |
Item Volume | 236 Milliliters |
Water Resistance Level | Waterproof |
Item Package Dimensions L x W x H | 7.75 x 3.39 x 1.75 inches |
Package Weight | 0.32 Kilograms |
Item Dimensions LxWxH | 3.5 x 7.75 x 1.95 inches |
Item Weight | 11.4 Ounces |
Brand Name | West System |
Model Name | 650-8 |
Suggested Users | Automotive |
Number of Items | 1 |
Manufacturer | WEST SYSTEM |
Part Number | 2270 |
Included Components | Epoxy |
Size | UNITS |

Enjoy fast, FREE delivery, exclusive deals and award-winning movies & TV shows with Prime
Try Prime
and start saving today with Fast, FREE Delivery
Amazon Prime includes:
Fast, FREE Delivery is available to Prime members. To join, select "Try Amazon Prime and start saving today with Fast, FREE Delivery" below the Add to Cart button.
Amazon Prime members enjoy:- Cardmembers earn 5% Back at Amazon.com with a Prime Credit Card.
- Unlimited Free Two-Day Delivery
- Instant streaming of thousands of movies and TV episodes with Prime Video
- A Kindle book to borrow for free each month - with no due dates
- Listen to over 2 million songs and hundreds of playlists
- Unlimited photo storage with anywhere access
Important: Your credit card will NOT be charged when you start your free trial or if you cancel during the trial period. If you're happy with Amazon Prime, do nothing. At the end of the free trial, your membership will automatically upgrade to a monthly membership.
Other Sellers on Amazon
& FREE Shipping
75% positive over last 12 months
& FREE Shipping
87% positive over last 12 months
& FREE Shipping
94% positive over last 12 months
West System G/Flex Epoxy (2-4oz)
- Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
- Learn more about free returns.
- Go to your orders and start the return
- Select the return method
- Ship it!
Purchase options and add-ons
Brand | West System |
Material | Epoxy |
Compatible Material | Plastic |
Item Form | Liquid |
Color | Clear |
About this item
- G/flex 650 is a toughened, versatile, liquid epoxy for permanent waterproof bonding of fiberglass, ceramics, metals, plastics, damp and difficult-to-bond woods.
- G/flex adheres tenaciously to difficult- to-glue hardwoods, both tropical and domestic varieties. This is important since many of the exotic and tropical species now being used to replace traditional woods present bonding challenges.
- G/flex has the ability to glue damp woods. It can be used on wet surfaces, even underwater when applied with specific techniques.
- Country of origin: United States
Similar item to consider
Frequently bought together

What do customers buy after viewing this item?
Product Description


WEST SYSTEM Specialty Epoxies
These specialty epoxies add even more versatility to the WEST SYSTEM line of epoxies.

G/flex Thickened Epoxy syringe
- Great on plastics including HDPE, LDPE, ABS, PVC, Polycarbonate, and Hypalon.
- Easy-to-use syringe to dispense small quantities of epoxy
- Viscosity similar to gel toothpaste—won’t run or sag
G/flex 655 is a toughened epoxy that makes permanent, waterproof structural bonds. It absorbs the stresses of expansion, contraction, shock, and vibration. G/flex adheres tenaciously to HDPE, LDPE ABS, PVC, Polycarbonate, and Hypalon plastics. It also bonds metal, glass, masonry, fiberglass, and wood. The G/flex 655-1 syringe contains 0.42 oz of resin and 0.42 oz of hardener, perfect for small repair jobs.

G/flex Thickened Epoxy Adhesive
- Great on plastics including HDPE, LDPE, ABS, PVC, Polycarbonate, and Hypalon.
- Easy-to-use syringe to dispense small quantities of epoxy
- Viscosity similar to gel toothpaste—won’t run or sag
G/flex 655 is a toughened epoxy that makes permanent, waterproof structural bonds. It absorbs the stresses of expansion, contraction, shock, and vibration. G/flex adheres tenaciously to HDPE, LDPE ABS, PVC, Polycarbonate, and Hypalon plastics. It also bonds metal, glass, masonry, fiberglass, and wood. The G/flex 655-1 syringe contains 0.42 oz of resin and 0.42 oz of hardener, perfect for small repair jobs.

G/flex is a 1:1 ratio, 2-part, toughened epoxy
- Great on plastics including HDPE, LDPE, ABS, PVC, Polycarbonate, and Hypalon.
- Easy-to-use syringe to dispense small quantities of epoxy
- Viscosity similar to gel toothpaste—won’t run or sag
G/flex 655 is a toughened epoxy that makes permanent, waterproof structural bonds. It absorbs the stresses of expansion, contraction, shock, and vibration. G/flex adheres tenaciously to HDPE, LDPE ABS, PVC, Polycarbonate, and Hypalon plastics. It also bonds metal, glass, masonry, fiberglass, and wood. The G/flex 655-1 syringe contains 0.42 oz of resin and 0.42 oz of hardener, perfect for small repair jobs.

G/flex Thickened Epoxy Adhesive, just stir and apply
- Great on plastics including HDPE, LDPE, ABS, PVC, Polycarbonate, and Hypalon.
- Easy-to-use syringe to dispense small quantities of epoxy
- Viscosity similar to gel toothpaste—won’t run or sag
G/flex 655 is a toughened epoxy that makes permanent, waterproof structural bonds. It absorbs the stresses of expansion, contraction, shock, and vibration. G/flex adheres tenaciously to HDPE, LDPE ABS, PVC, Polycarbonate, and Hypalon plastics. It also bonds metal, glass, masonry, fiberglass, and wood. The G/flex 655-1 syringe contains 0.42 oz of resin and 0.42 oz of hardener, perfect for small repair jobs.

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 AdhesiveSix10 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 EpoxiesG/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 AdhesiveG/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. |
![]() |
![]() |
![]() |
![]() |
|
---|---|---|---|---|
Six10 Thickened Epoxy Adhesive | G/flex 650 Toughened Epoxy | G/flex 655 Thickened Epoxy Adhesive | G/5 Five-Minute Adhesive | |
Mix ratio, resin:hardener | NA (dispenses at proper ratio) | 1:1 | 1:1 | 1:1 |
Pot life @72°F | 42 minutes (in static mixing wand) | 45 minutes | 45 minutes | 3-5 minutes |
Working time, thin film @72°F | 42 minutes | 45 minutes | 45 minutes | 3-5 minutes |
Cures to a solid, thin film @72°F | 5 to 6 hours | 3 to 4 hours | 3 to 4 hours | 5 minutes |
Cures to working strength @72°F | 1 to 4 days | 7 to 10 hours | 7 to 10 hours | 15 minutes |
Minimum working temp | 50°F (4°C) | 40°F (4°C) | 40°F (4°C) | |
Hardness (Shore D) ASTM D-2240 | 80.6 | 75 | 75 | |
Compression yield (ASTM D-685 | 9,690 psi | 5,270 psi | 5,270 psi | |
Tensile strength ASTM D-638 | 6,440 psi | 3,440 psi | 5,270 psi | |
Flexural strength ASTM D-790 | 11,300 psi | 5,190 psi | 5,270 psi |

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.
Product Description
G/flex Epoxy Adhesive belongs in every boater's repair kit. Get a waterproof, flexible bond on plastic, fiberglass, aluminum, etc. The 650-8 kit gives you two 4 oz. bottles of the liquid epoxy. The 650-8 kit contains 4 oz. each of viscous liquid G/flex 650 resin and hardener. Mixing ratio is 1: 1. Mixed G/flex 650 is of a heavy "syrup" consistency. It will run off a vertical surface. 650 can be thickened with inert filling materials. G/flex is a product of West System, a division of Gouge on Brother's, The Gouge on brothers have been using epoxy resins in boat building and repair for some 50 years. It makes structural bonds that can absorb the stresses of expansion, contraction, shock and vibration. In addition to its superior bonding to many different materials and its ability to bond dissimilar materials, G/flex is much more flexible than other epoxies. This is an excellent property for boat building and repair. Polyethylene (HDPE) is a common kayak and canoe material. Its molecular structure resists gluing by most adhesives. G/flex solves the problem; it bonds well to polyethylene and ABS plastics. At 72 F pot life is 45 minutes. Working time is 75 minutes. It cures to a solid in three hours and cures to its full strength in one to two days. It cures faster in warmer temperatures and slower in colder ones. Clean up is simple. Wipe up spills with absorbent materials. Clean residue before it cures, with alcohol or acetone. G/flex adheres tenaciously to difficult-to-glue hardwoods, both tropical and domestic varieties. It has the ability to glue damp woods. It can be used on wet surfaces, even underwater when applied with specific techniques. G/flex does indeed belong in every boater's repair kit. The more you use it, the more uses you'll find for it - with your boating gear and other sporting and household items. It's easy to mix and use. The instructions that come with the kit are top notch.
Product information
Technical Details
Additional Information
ASIN | B002IZFPQE |
---|---|
Customer Reviews |
4.8 out of 5 stars |
Best Sellers Rank | #13,111 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #11 in Boat Painting Supplies #42 in Boat Hardware |
Date First Available | October 1, 2001 |
Feedback
Videos
Videos for related products
0:58
Click to play video
Short tutorial on dispensing and mixing WEST SYSTEM Epoxy.
Gougeon Brothers Inc.
Videos for related products
0:45
Click to play video
How to properly install WEST SYSTEM Mini Pumps
Gougeon Brothers, Inc.
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on Amazon
-
Top reviews
Top reviews from the United States
There was a problem filtering reviews right now. Please try again later.
Not for wetting out large sheets of fiberglass or carbon.
I highly recommend. Hasn't failed me yet. I really like the squirt bottles rather than the tubes that always seem to be no good when I go to use them a second time. I am definitely buying again.
Top reviews from other countries




