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West System 205 Fast Hardener

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Overview

205 Fast Hardener is a medium-viscosity epoxy curing agent. It is used in a majority of bonding situations, at lower temperatures, and to produce a rapid cure that develops its physical properties quickly at room temperature. When mixed with WEST SYSTEM 105 Resin in a five-part resin to one-part hardener ratio, the cured resin/hardener mixture yields a rigid, high-strength, moisture-resistant solid with excellent bonding and coating properties. 205 Fast Hardener is not intended for clear coating.

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

It is indeed fast. The trick is to plan ahead and don’t be shy - get it out of the pot and spread out to limit runaway exothermic reaction

Todd J Verified Purchase

WEST SYSTEM FAST HADENER 205 1G

April 8, 2022

Work like its supposed to thought it would work faster but it still takes a day before you can really sand or work it

Art B Verified Purchase

WEST SYSTEM EPOXY 205 FAST HARDENER QT

July 31, 2021

Q&A

Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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