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West System Epoxy 207 Special Clear Hardener

Select Size:
.66 Pint.33 Gallon1.45 Gallon

Overview

Blush-free 207 Special Clear Hardener was developed for coating and fiberglass cloth application where an exceptionally clear, moisture-resistant, natural wood finish is desired. Blended with 105 Epoxy Resin, 207 Hardener will not blush or turn cloudy in humid conditions. Thin film applications roll out and tip off smoothly, requiring less sanding in preparation for finish coatings.

Professional and first-time builders like 207 Special Clear Hardener because it is reliable, easy to use, as does not blush. Three coats or more can be applied in one day without additional surface preparation. Fewer coats are required to fill fiberglass weave and in most cases, the final coating can be sanded the following day. Boats can be built faster. Builders also appreciate the excellent fiberglass wet-out characteristics achieved with 105 Resin/207 Special Clear Hardener, yet it wont drain from vertical surfaces like the very slow curing, low-viscosity epoxies.

105/207 Epoxy has strong physical properties, so it can be used as a structural adhesive for gluing and laminating. It has excellent compatibility with paints and varnishes. An ultraviolet inhibitor in 207 Special Clear Hardener helps provide a beautiful, long-lasting finish when used with quality UV filtering varnish. 105/207 cures clear and colorless.
  • Mix Ratio: 3 parts resin : 1 part hardener
  • Pot life at 72F (22C): 20 to 26 minutes
  • Cure to a solid state: 10 to 15 hours
  • Cure to maximum strength: 4 to 7 days
  • Minimum recommended temperature: 60F (16C)

Features

  • Excellent for use in hot or humid conditions
  • Produces a clear, low-blush finish
  • Provides excellent adhesion for bonding applications
  • Contains UV stabilization additive, but still requires long term UV protection with quality marine paint or varnish
  • 300 Mini-Pump Kit recommended for Group Sizes A, B, and C
  • 306-23 Special Purpose Resin/Hardener Pump (Model 128845) recommended for large quantities

Selection Guide

Reviews

I expect this to do the job I want, casting some small projects.

Noel B Verified Purchase

WEST SYSTEM 207 CLEAR HARDENER .66 PT

July 17, 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.

Q: What is the temperature rating for the West Systems 105/207 Epoxy System?

This system has a max Tg of 116 degrees Farenheit. For all other technical information, please see the Tech Data Sheet located in the "Documents" tab of this web page.

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