West System 205A Fast Hardener for 105 Epoxy Resin

WEST SYSTEM 205 Fast Hardener is a medium-viscosity epoxy curing agent designed for general coating, bonding, and laminating applications. Formulated to produce a rapid cure that develops physical properties quickly at room temperature, it is an ideal choice for a wide range of marine, woodworking, and composite repair projects.

When blended with WEST SYSTEM 105 Epoxy Resin at a 5:1 ratio (resin to hardener), the cured mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties. The 205 Fast Hardener is especially well-suited for use at lower temperatures, with a minimum recommended working temperature of 40°F (4°C).

Key Features:

• Rapid cure: pot life of 9–12 minutes at 72°F (22°C)
• Cures to a solid state in 6–8 hours; reaches maximum strength in 1–4 days
• Medium-viscosity formula for easy dispensing, mixing, and application
• Bonds to wood fiber, fiberglass, reinforcing fabrics, and a variety of metals
• Produces a rigid, high-strength, moisture-resistant cured solid
• Effective for coating, bonding, barrier coating, and fabric lamination
• Compatible with WEST SYSTEM fillers, pigments, and additives for custom formulations
• Works in cold-weather applications down to 40°F (4°C)
• Not intended for clear coating applications

Use the WEST SYSTEM 300 Mini Pumps (sold separately) to dispense 105 Resin and 205 Fast Hardener at the correct 5:1 ratio automatically. For best results in cold weather, warm both the resin and hardener before use to reduce viscosity and ensure thorough mixing. Store at room temperature with containers closed to prevent contamination.