209 EXTRA SLOW HARDENER
209 EXTRA SLOW HARDENER 209 Extra Slow Hardener® is formulated for use with WEST SYSTEM® 105 Epoxy Resin® or general coating and bonding applications in extremely warm and/or humid conditions or when extended working time is desired at room temperature.


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209 EXTRA SLOW HARDENER 209 Extra Slow Hardener® is formulated for use with WEST SYSTEM® 105 Epoxy Resin® or general coating and bonding applications in extremely warm and/or humid conditions or when extended working time is desired at room temperature.
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| Chemistry | Epoxy |
|---|---|
| Mix ratio | 3 parts resin to 1 part hardener by volume |
| Pot life | At 72°F (22°C): 40 to 50 minutes (100 g cupful) |
| Working time | At 72°F (22°C): 3 to 4 hours (thin film) |
| Solid-state cure | At 72°F (22°C): 20 to 24 hours |
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209 SDS
Product safety and handling information.
Safety data sheet – 209 EXTRA SLOW HARDENER
Product safety and handling information.
105-209 Epoxy Resin
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Full product details, applications & manufacturer specifications
209 EXTRA SLOW HARDENER 209 Extra Slow Hardener® is formulated for use with WEST SYSTEM® 105 Epoxy Resin® or 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® . 105/209 forms a high-strength, moisture-resistant solid with excellent bonding and coating properties. The mix ratio is 3 parts resin to 1 part hardener by volume. Not intended for clear coating.
Selection Guide.
Recommended uses
Composite epoxy Epoxies- Chemistry
- Epoxy
- Mix ratio
- 3 parts resin to 1 part hardener by volume
- Pot life
- At 72°F (22°C): 40 to 50 minutes (100 g cupful)
- Working time
- At 72°F (22°C): 3 to 4 hours (thin film)
- Solid-state cure
- At 72°F (22°C): 20 to 24 hours
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Complete your project.
Companion products for the selected product and system.

300 Mini Pumps
Meter resin and hardener accurately for the 105 System.
For Group A, B and C containers only. Fit the correct hardener pump and tubes for your container size.

105 Epoxy Resin
The resin used with WEST SYSTEM 200-series hardeners.
Choose matching resin and hardener group sizes and follow the specified mix ratio.
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