West System 205 Fast Hardener® is a medium-viscosity epoxy curing agent. It is used in a majority of situations, at lower temperatures and to produce a rapid cure that develops its physical properties quickly at room temperature. When mixed with West System 105 Resin (#40-4103) in a five-part resin to one-part hardener ratio, the cured resin/hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties. Not intended for clear coating.
- Pot life at 72F (22C): 9 to 12 minutes.
- Cure to a solid state: 6 to 8 hours.
- Cure to maximum strength: 1 to 4 days.
- Minimum recommended temperature: 40°F (4°C).
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