WEST SYSTEM 205 FAST 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. 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. Tip: West System is a 2 part epoxy system that is measured by volume or weight. The volumes are NOT 50-50. We suggest you also purchase the set of 3 mini-pumps that will dispense the resin and hardener in the correct proportions. The upside to the pumps are they are very easy to use, the downside is they tend to dispense just a little more than you need. If you want to use small amounts, measure by volume using the weight ratio's listed on the containers.