Fiberglass won't set
 

I did some minor repairs with a fiberglass paste with a 1:50 catalyst according to directions. The instructions say it should set in 2 hours. Its 3 days later now and still a bit tacky. Is there a way to force the cure? I think it might have been a little too cool (~60 degrees?) for the first 2 days. I thought I estimated the catalyst amount right...it looked the right pastel color (paste was tan and the catalyst is red)

Its porsche & technical! ...these are minor repairs on the air shroud around the 'captive nuts' and a crack I had around the #6 intake.

Thanks

Ultraviolet light helps-the sun.

Jeff

Sun and heat.

It should have set by now. Did you mix by weight or volume? Most resins are by volume. May have to grind it out and start over. Resins are very sensitive to changes in hardener, 10% either way is about the max.

JohnJL,
Which f/g repair product did you use? I want to repair my shroud this winter.

If the resin or catalyst was old, that might have caused it. I think the 10% variance is for ideal setting, but even if you were below that polymerization should have happened by now. My bet is you got some bunk resin/catalyst. I've over and under kicked polyesther resins (paste and liquid) and never had problems with setting unless it was really old.

Thanks guys.

I am using "Septone" fiberglass paste & hardener. Looked fairly new...will try the heat and light and see it that works.

My money's on old hardner.

If it hasn't cooked off now - it probably not going to. I would grind off and use west system epoxy. Get from any boat supply place.