West System G/Flex 655 Epoxy – Flexible Toughened Adhesive, 8 oz.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Epoxy That Flexes With Your Boat
Standard epoxies are rigid — and on a boat, rigid bonds can crack under the constant flex, vibration, and thermal cycling that marine life demands. West System G/Flex 655 is engineered differently. It cures to a tough, semi-flexible state that absorbs stress and movement without letting go, making it the go-to adhesive for repairs that need to last.
The 8 oz. kit includes both the resin and hardener, giving you enough material for multiple repairs or a single substantial job.
Key Features
- Flexible cure — absorbs vibration, impact, and thermal movement
- Bonds difficult substrates including polyethylene, polypropylene, and wet or oily wood
- Excellent adhesion to fiberglass, metals, and most plastics
- Waterproof and fuel-resistant when fully cured
- 8 oz. kit includes resin and hardener
- SKU: 655-8
Parts Desk Insights
Best use case: G/Flex 655 is the right choice when the bond line will experience ongoing flex or vibration — think hull-to-deck joints, through-hull fittings, kayak and canoe repairs, or bonding rubber and plastic components that standard epoxy would crack away from over time. It also excels at wet-surface repairs where you can't fully dry the substrate before bonding. For structural laminating work where rigidity is preferred, pair it with West System Fast Hardener 205A. For filling and fairing, consider West System Low Density Filler or West System Microlight Filler. For quick two-part adhesive jobs, the West System G/5 Five-Minute Adhesive is a fast-cure alternative.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.