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209 Extra Slow Hardener

209 Extra Slow Hardener® is formulated for use with WEST SYSTEM 105 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. Not intended for clear coating.

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PROJECT USES:

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

CURE TIME:

  • Pot life (100 grams cupful):
    • At 25°C: 50 to 70 minutes
  • Working time (thin film):
    • At 25°C: 200 to 260 minutes
  • Solid state:
    • At 25°C: 20 to 24 hours

*Epoxy cures faster at higher temperatures and in thicker applications.

CURE TEMP:

  • Minimum recommended temperature: 18°C

PRODUCT SIZES:

  • 209-A: 0.29kg
  • 209-B: 1.45kg
  • 209-C: 7.2kg
  • 209-E: 64.5kg

*These sizes are 209 hardener sizes ONLY and exclude resin sizes

209 Extra Slow Hardener Facts

UNCONTROLLED CURE

Controlling exotherm (the heat released by the chemical reaction between resin and hardener that cures epoxy) is very important, especially when mixing larger batches of resin and hardener. If not controlled, epoxy’s exothermic reaction can be dangerous.
Control Exotherm

WARM WEATHER BONDING

During warm summer months, WEST SYSTEM Epoxy working time and other handling characteristics will be different than at other times of the year. There are some steps you can take to extend epoxy working times and ensure good results when using WEST SYSTEM Epoxy in warm environments.
Warm Temp Bonding

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