Patching exterior cracks with wood filler

Old 05-13-16, 11:38 AM
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Patching exterior cracks with wood filler

I have small cracks and holes on the fiberglass siding of the exterior treads and the landing leading to my entrance door. I want to patch them up and recoat the entire surface with epoxy part-1 acrylic paint in order to prevent damage to the underlying plywood through water infiltration.
At first I thought to use fiberglas resin to repairs the cracks, but it is messy.
I thought a wood filler like Elmer's could do the job. It dries in 15 minutes and it is apparently tough.
The only thing I wonder is if the wood filler can withstand cold temperatures in winter( -15 C) without cracking. It would be under 3 layers of epoxy part1 paint, anyway. Any comments on this?


Old 05-13-16, 01:52 PM
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If it's an exterior filler it should be ok. I wouldn't use an interior filler for this.

Personally, I like WoodEpox epoxy filler for fixes like this. It does take overnight to fully cure, but then tools and finishes very well.
Old 05-13-16, 05:23 PM
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How about a picture so we can see what your seeing.
No way would I be using a wood filler of your trying to fill in cracks in fiberglass!
Messy or not it may be the right way to do it and not just have it fail again.

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