West System Hardener

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 the 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.

• Pot Life at 22°C: 9 to 12 minutes.
• Cures to a solid-state: 6 to 8 hours.
• Cures to maximum strength: 1 to 4 days.
• Minimum recommended temperature: 4°C.

205 Fast Hardener® is formulated for general coating and bonding applications at lower temperatures and to produce a rapid cure that develops its physical properties quickly at room temperature. The 105 Epoxy Resin®/205 Fast Hardener system forms a high-strength, moisture-resistant solid bond with excellent bonding and barrier coating properties. The mix ratio is 5 parts resin to 1 part hardener by volume. Not intended for clear coating.

• Pot life (100 grams cupful):
  • At 72°F (22°C): 20 to 25 minutes
• Working time (thin film):
  • At 72°F (22°C): 90 to 110 minutes
• Solid state:
  • At 72°F (22°C): 10 to 15 hours