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West System 209 Extra Slow (Tropical) hardener is formulated for use with WEST SYSTEM 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.
It provides approximately twice the working time of 206 Slow Hardener. 209 cures to a clear amber-colored solid with good physical properties and moisture resistance for bonding and coating applications. Not intended for clear coating.
| Mix Ratio, Resin:Hardener | 3:1 by volume (3.5:1 by weight) |
|---|---|
| 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) |
| Pumps required | 300, 306-23 or 309-3 |
Reviews for WEST System 209 Tropical Hardeners
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Building radio control model planes and need to "fill in the gaps" with this and micro balloons. Have not used. Just got it, as suggested by another modeler, to have available when the "filling" begins.
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Allowed me plenty of time to get transom in and secured before it started gelling and curing. Transom is now bulletproof! And in 90+ degrees!
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