Epoxy Pinholes

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Forum topic by texanbuildings posted 02-02-2017 06:46 PM 477 views 0 times favorited 5 replies Add to Favorites Watch
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1 post in 410 days

02-02-2017 06:46 PM

Topic tags/keywords: epoxy pinholes mesquite voids cracks

I am making several projects from mesquite slabs. Using west systems epoxy to fill voids and cracks.

After initial sanding some pinholes appear in epoxy and I apply more epoxy to small holes. In some of the holes the 2nd application of epoxy does not fill hole after sanding. Some of the holes I have tried to fill 3 or 4 times and the epoxy will not fill pinhole.

Any tricks to get epoxy to fill pinholes?

5 replies so far

View MrUnix's profile (online now)


6480 posts in 2131 days

#1 posted 02-02-2017 09:14 PM

Open them up a little with a dremel or similar and heat the epoxy and work piece slightly so it flows better. Putting epoxy in the pinhole and then agitating it with a toothpick or paper clip after application will also help remove any bubbles that may still be present.


-- Brad in FL - In Dog I trust... everything else is questionable

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3584 posts in 3300 days

#2 posted 02-02-2017 09:20 PM

Your pin holes are air bubbles, don’t mix the epoxy too aggressively. As brad said, a little heat will help the epoxy flow better, just not too hot.

View shipwright's profile


7937 posts in 2730 days

#3 posted 02-03-2017 12:33 AM

After the initial application, play a heat gun over the surface. It will heat and expand any bubbles and it will thin the material a bit. The combination of the two should make the bubbles rise and pop on the surface before the epoxy crosslinks.
Use a special self levelling formulation made for bar tops.

Fixing the pinholes after the fact is a lot of unnecessary work.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees.

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Steve Peterson

368 posts in 3014 days

#4 posted 02-03-2017 06:58 PM

I think the toothpick idea sounds like the best idea for getting the epoxy into the holes.

-- Steve

View Jim Finn's profile

Jim Finn

2637 posts in 2854 days

#5 posted 02-10-2017 01:41 PM

I use a finishing resin for this. Zpoxy is a thin epoxy and will penetrate a deep crack very well. It is a 30 minute epoxy and does not bubble.

-- No PHD, but I have a GED and my DD 214

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