- Designed for general bonding and coating applications, especially in cooler temperatures
- Produces a fast cure and develops strength quickly at room temperature
- Cures to a high-strength, moisture-resistant solid when mixed with 105 Resin
- Ideal when you need a shorter working time and faster turnaround between coats
- Not intended for clear coating—use 207 Hardener for bright finishes
- Mix ratio: 5 parts 105 Resin to 1 part 205 Hardener (by volume)
- Pot life of 9 to 12 minutes at 72°F (22°C), giving you a short working window
- Hardener Cure Temperature range is 40°F to 90°F
- Cures to a solid state in 6 to 8 hours; full working strength in 1 to 4 days
- Minimum recommended application temperature: 40°F (4°C)
WEST SYSTEM 205 Fast Hardener®
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Storage & Shelf Life
Store at room temperature. Keep containers closed to prevent contamination.
With proper storage, resin and hardeners should remain usable for many years. After a long storage period, verify the metering accuracy of the pumps. Mix a small test batch to assure proper curing. 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. If clear finishing, be aware of a possible color shift if very old and new hardeners are used on the same project.