# West System slow hardener question

**URL:** <https://forum.clcboats.com/t/west-system-slow-hardener-question/36658>\
**Category:** Builder's Forum\
**Created:** [April 6, 2010, 5:11pm UTC](https://forum.clcboats.com/t/west-system-slow-hardener-question/36658 "2010-04-06T17:11:50Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Richard\_Lang](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@Richard\_Lang](https://forum.clcboats.com/u/Richard_Lang)\
**Post date:** [April 6, 2010, 5:11pm UTC](https://forum.clcboats.com/t/west-system-slow-hardener-question/36658/1 "2010-04-06T17:11:50Z")

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For some strange reason, I ran out of MAS hardener before the resin.&nbsp; Since I have very little left to do, and couldn't find Mas hardener locally, I bought a pint of West System 106.&nbsp; Tried it with Mas (2:1) and it cured okay.

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Finally my question:&nbsp; the can states:&nbsp; "Not for clear coat."&nbsp; I am assuming they mean there's no UV protection, but I am not sure.&nbsp; Need an epoxy guy(or girl) to advise.&nbsp; I plan to sand/varnish after epoxy cures.

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Thanks!

&nbsp;

Rich

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**Author:** ![Charles\_Fronzek](https://avatars.discourse-cdn.com/v4/letter/c/a9a28c/32.png) [@Charles\_Fronzek](https://forum.clcboats.com/u/Charles_Fronzek)\
**Post date:** [April 6, 2010, 6:20pm UTC](https://forum.clcboats.com/t/west-system-slow-hardener-question/36658/2 "2010-04-06T18:20:01Z")

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I may be this,

West had an&nbsp;hardener that was designed for wooden hulls&nbsp;like strippers where the the wood was supposed to be seen. It was a bit yellow so they developed a&nbsp;newer product&nbsp;without the yellow cast.

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**Author:** ![Richard\_Lang](https://avatars.discourse-cdn.com/v4/letter/r/d26b3c/32.png) [@Richard\_Lang](https://forum.clcboats.com/u/Richard_Lang)\
**Post date:** [April 6, 2010, 6:48pm UTC](https://forum.clcboats.com/t/west-system-slow-hardener-question/36658/3 "2010-04-06T18:48:30Z")

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Thanks Charlie.&nbsp; I already have several coats of Mas resin/hardener on my stripped deck.&nbsp; Do you think using the West Sysrtem hardener will affect the finish (i.e. yellow tint)?