West System 655-C205A Fast Hardener, 208 ml (7 oz.)
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West System 655-C205A Fast Hardener, 208 ml (7 oz.)
The 655-C205A is a fast-cure epoxy hardener designed for use with West System 105 Resin at a 5:1 mix ratio. It produces a rigid, high-strength, moisture-resistant bond and is the right choice when working temperatures are cool or when a quick return-to-service time is the priority. With a pot life of 9–12 minutes at 22°C (72°F), it suits smaller pours, laminating passes, and repair work where you want to move through multiple steps in a single session.
Key Features
- Fast cure formulation — pot life of 9–12 minutes at 22°C (72°F)
- Mix ratio: 5 parts 105 Resin to 1 part C205 Hardener by volume
- Produces a rigid, high-strength, moisture-resistant cured solid
- Well-suited to cool working conditions where slower hardeners may under-cure
- 208 ml (7 oz.) bottle — sized for repair work and smaller laminating jobs
- Compatible with the West System 300 Mini Pump for accurate metered dispensing
Parts Desk Insights
Best Use Case: The C205 Fast Hardener is the standard recommendation for customers doing fibreglass repairs, bonding, and laminating in cooler shop or outdoor conditions — typically below 21°C (70°F) — where a slow hardener would extend cure time impractically. The short pot life makes it less suitable for large pours or complex layups where extended working time is needed; for those applications, steer customers toward the West System 206 Slow Hardener, the C209SA Extra Slow Hardener, or the C209SB Extra Slow Hardener. Customers needing a larger supply of this same hardener should consider the West System C205 Hardener, 814 ml (27.5 oz.). For customers building a complete repair setup, the West System 655-C105K Fibreglass Boat Repair Kit includes this hardener alongside resin, fillers, and glass tape.
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.