G/flex 650-CH Epoxy Hardener
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WEST SYSTEMG/flex 650-CH Epoxy Hardener

Model # 9681511 | Mfg # 650-CHUPC # 811343012069

This item is no longer available.


G/flex 650-CH Epoxy Hardener

Name Value
Best Use Hardener for G/Flex 650 Resin
Capacity 4.7 Gallons
Cure Time 7 to 10 Hours (Working Time 75 Minutes) at 72 F
Type Hardener

Product Overview

Toughened, versatile, liquid epoxy resin for permanent  bonding of fiberglass, ceramics, metals, plastics, damp and difficult-to-bond woods.

G/flex 650 is a bit more flexible than standard epoxies and polyester, but much stiffer than adhesive sealants. This gives G/flex 650 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, G/flex 650 gives you 45 minutes of working time at 72°F. It reaches an initial cure in 7 to 10 hours and full cure in 24 hours. 650 G/flex Resins should be paired with comparable size 650 G/flex Hardeners.

Key Features

  • More flexible than standard epoxy or polyester resins
  • Structural bonds absorb stress of expansion, contraction, shock and vibration
  • Good for bonding dissimilar materials
  • Can be modified with WEST SYSTEM fillers and additives


  • Formulation: Two-part epoxy
  • Mix Ratio: 1 : 1
  • Working Time:  45min. @ 72°F
  • Drying Time: Initial cure: 6-10hrs.; Full cure: 24hrs.

G/flex Instructions


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