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WEST SYSTEM Epoxy-Hardener

WEST SYSTEM Epoxy Hardener comes in 205 Fast, 206 Slow and 209 Extra-Slow and when mixed with WEST SYSTEM 105 Epoxy Resin it is an ultra-tough waterproof coating, a high-strength, gap filling adhesive or an easily sanded surface filler for wood, fiberglass, reinforcing fabrics, and a variety of metals.
Item #
GRP17645_2
Grouped product items
Product Price Qty
206A Slow Hardener, 0.44 Pint Item #37136
In stock
$24.99 Each
206B Slow Hardener, 0.86 Quart Item #37144
In stock
$54.99 Each
205A Fast Hardener, 0.44 Pint Item #37110
In stock
$28.99 Each
205B Fast Hardener, 0.86 Quart Item #37128
In stock
$69.99 Each
207A Coating Hardener, 0.66 Pint Item #37178
In stock
$49.99 Each
207B Coating Hardener, 0.33 Gallon Item #37186
In stock
$99.99 Each
Shipping Restrictions: Ground Transportation Only

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Highly trusted by boat-builders, WEST SYSTEM Epoxy is ideal for use as an ultra-tough waterproof coating, a high-strength, gap-filling adhesive or an easily sanded surface filler. The Resin works in conjunction with a variety of WEST SYSTEM Hardeners, Fillers and Pumps for a wide range of applications.

Combined with 205 Fast, 206 Slow and 209 Extra-Slow Hardeners, the cure time of 105 can be fine-tuned and adjusted for a wide range of temperatures. For coating and roller applications, it can be combined with 207 Coating Hardener, which provides excellent thin-film characteristics to flow out and self-level without "fisheyeing." Cures clear to light amber, so you can achieve a natural wood finish when coating with varnish.

(1) WEST SYSTEM Epoxy-Hardener

More Information
Brand West System
Tech Spec

205 Fast Hardener (#37110 or #37128)

  • Pot life at 72°F (22°C) - 9 to 12 minutes.
  • Cure to a solid state - 6 to 8 hours.
  • Cure to maximum strength - 1 to 4 days.
  • Minimum recommended temperature - 40°F (4°C).

206 Slow Hardener (#37136 or #37144)

  • Pot life at 72°F (22°C) - 20 to 25 minutes.
  • Cure to a solid state - 9 to 12 hours.
  • Cure to maximum strength - 1 to 4 days.
  • Minimum recommended temperature - 60°F (16°C).

209 Extra-Slow Hardener (#37194)

  • Pot life at 72°F (22°C) - 40 to 50 minutes.
  • at 95°F (35°C) - 15 to 20 minutes.
  • Cure to a solid state at 72°F (22°C) - 20 to 24 hours.
  • at 95°F - 6 to 8 hours(35°C).
  • Cure to maximum strength at 72°F - 4 to 9 days.
  • Minimum recommended temperature - 70°F (21°C).

206 Coating Hardener (#37136 or #37144)

  • Pot life at 72°F (22°C) - 22 to 27 minutes.
  • Cure to a solid state - 9 to 12 hours.
  • Cure to maximum strength - 4 to 7 days.
  • Minimum recommended temperature - 60°F (16°C).