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West Systems G-Flex Flexible Epoxy is perfect to throw in your repair kit. It will adhere to roto-molded polyethylene plastics helping you repair your kayak, camp gear, or nearly anything that needs fixing.
G/flex 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. 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.