We do a polyaspartic on concrete counter tops and the school teaches to use a torch to remove air bubbles,  it works great for that. I would imagine this is what it would look like doing that process on a floor. Notice also the shoes worn.

https://www.youtube.com/watch?v=LQLLDLIkC9E

Hope this is helpful
Randy, CEI

On Sep 21, 2014, at 6:29 PM, Hector Castillo <hectorcastillo@comcast.net> wrote:

I am testing durraamen e 32 water base primer on a Mexican a tile .I used a Short nap 1/4 roller it left small pin holes then I used u46 polyurethane on the 2 coat and you can still see the pin hole.
Any ideas way the 1 coat had pin hole . Hector castillo

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