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207 Special Clear Hardener was especially developed for use with West System 105 resin in coating applications where an exceptionally clear moisture-resistant natural wood finish is desired.
Improved formula chemistry allows for true clear cure with same UV stability without amber tint. An ultraviolet inhibiting additive improves the resistance of a West System 105/207 mixture to sunlight but the cured epoxy surface will still require the additional protection of a quality UV-filtering varnish.
207 is designed to self level for smooth finishes and to wet-out and bond fabrics. Although it provides good physical properties for general bonding applications, it is more difficult to thicken and less cost effective for this purpose than 205 or 206 hardeners. It's also used for laminating veneers where bleed through at joints may be exposed to sunlight.
|Mix Ratio, Resin:Hardener||3:1 by volume (3.5:1 by weight)|
|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)|
|Pumps required||300, 306-23 or 309-3|