West System Fast Hardener

205 Fast Hardener is a medium-viscosity epoxy curing agent. It is used in a majority of bonding 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 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. 205 Fast Hardener is not intended for clear coating.

Mix Ratio  5 parts resin : 1 part hardener 
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)

If you have purchased the A size Resin then you need the A size Hardener and the same for the B size Resin you need the B size Hardener

Safety Data Sheet - PDF