West System 209 Extra Slow Hardener


SKU: C209 Category:


West System 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.


  • Marine
  • Boat Repair
  • Bonding
  • Fabrication
  • Barrier Coating


  • Pot life (100 grams cupful):
  • At 72°F (22°C): 40 to 50 minutes
  • Working time (thin film):
  • At 72°F (22°C): 3 to 4 hours
  • Solid state:
  • At 72°F (22°C): 20 to 24 hours

Additional information

Weight N/A
Dimensions N/A

315 ml (10.6 oz.), 1.24 L (42.2oz.), 5.3 L (1.4 Gallon)

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