West System® 205 Fast Hardener®. Formulated for general coating and bonding applications at lower temperatures. Produces a rapid cure that develops its physical properties quickly at room temperature. For use with West System® 105 Epoxy Resin®. Forms a high-strength, moisture-resistant solid bond with excellent bonding and barrier coating properties. Mix ratio is 5 parts resin to 1 part hardener by volume. Not intended for clear coating. Minimum cure temperature is 40 degrees F (4 degrees C). 0.94 gallon.

Cure Times at 72 degrees F (22 degrees C):

- Pot life (100 grams cupful): 9 to 12 minutes
- Working time (thin film): 60 to 70 minutes
- Solid state: 6 to 8 hours