West System 205A Fast Hardener for 105 Epoxy Resin

The WEST SYSTEM 205A Fast Hardener is a low-viscosity epoxy hardener engineered for rapid cure applications where quick return-to-service time is essential. Formulated specifically for use with WEST SYSTEM 105 Epoxy Resin at a precise 5:1 mix ratio by volume, it produces a rigid, high-strength, moisture-resistant laminate ideal for marine, woodworking, and composite repair applications.

With a pot life of 9 to 12 minutes at 72°F (22°C), the 205A Fast Hardener is well-suited for smaller projects or repairs that require a shorter working window and faster cure times compared to standard or slow hardeners. It reaches a tack-free state quickly, allowing subsequent coats or finishing work to begin sooner.

Key Features:

• Rapid cure formulation with a 9–12 minute pot life at 72°F
• Designed for use with WEST SYSTEM 105 Epoxy Resin at a 5:1 mix ratio by volume
• Produces a rigid, high-strength, moisture-resistant cured solid
• Low viscosity for excellent wet-out of fiberglass, wood, and composite materials
• Compatible with WEST SYSTEM 300 Mini Pumps for accurate metered dispensing
• Ideal for small repairs, laminating, and coating in cool or moderate temperature conditions
• Can be blended with WEST SYSTEM fillers and additives for a wide range of applications

The 205A hardener is a staple in marine repair, boat building, and composite fabrication shops where speed and reliability matter. When used with the 300 Mini Pump set, precise ratio dispensing is maintained, minimizing waste and ensuring consistent results every time.