209 Extra Slow Hardener™ is formulated for use with WEST SYSTEM Brand 105 Resin for general coating and bonding applications in extremely warm and/or humid conditions or when extended working time is desired at room temperature. Provides approximately twice the working time of 206 Slow Hardener. Forms a clear, amber-colored solid with good physical properties and moisture resistance for bonding and coating applications. Not intended for clear coating.
Pot life at 72°F (22°C): 40 to 50 minutes
Pot life at 95°F (35°C): 15 to 20 minutes
Cure to a solid state at 72°F (22°C): 20 to 24 hours
Cure to a solid state at 95°F (35°C): 6 to 8 hours
Cure to maximum strength at 72°F: 4 to 9 days
Minimum recommended temperature: 70°F (21°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 ||Uses |
|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 |
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