Fast Hardener (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 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. 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)
Store at room temperature. Keep containers closed to prevent contamination. With proper storage, resin and hardeners should remain usable for many years. Over time, 105 Resin will thicken slightly and will therefore require extra care when mixing. Repeated freeze/thaw cycles during storage may cause crystallization of 105 Resin. Warm resin to 125°F and stir to dissolve crystals.
Hardeners may darken with age, but physical properties are not affected by color. After a long storage, verify the metering accuracy of the pumps and mix a small test batch to assure proper curing.
|Hardener Temperature Range (F)||Cure Speeds at 72 degrees|
|Pot Life: 100g cupful||Working Time: thin film||Cure to Solid: thin film|
|205 Fast Hardener||General bonding, fabric application and barrier coating||45-85 degrees||9-12 min||60-70 min||6-8 hours|
|206 Slow Hardener||General bonding, fabric application and barrier coating||60-90 degrees||20-25 min||90-110 min||10-15 hours|
|207 Special Clear Hardener||Clear fabric application and clear coating for a natural wood finish||60-90 degrees||22-27 min||110-130 min||12-18 hours|
|209 Extra Slow Hardener||General bonding, fabric application and barrier coating||65-100 degrees||40-50 min||3-4 hours||20-24 hours|