We had a similar problem with a terra cotta floor. Both the dealer and topcoat did this. Turned out they had a flood in the basement and the moisture was moving up through the tiles. Didn't happen in the area that was not above the basement. We had to strip the topcoat, apply lacquer thinner to the Alson mexiglaze in order to remove bubbles, then reapplied the topcoat very slowly. But wasn't a perfect solution. 
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On Mon, Sep 22, 2014 at 10:57 AM, stuart rosen <mail@stoneshine.com> wrote:

I think it is vapor transmission.
We do the same on countertops-it does work really good-we also use some needles to pop the air bubbles as they rise.
This seems to help also.
One other thing we do is run the torch over the surface prior to applying as this seems to pull out any moisture.
On Sun, Sep 21, 2014 at 6:29 PM, Hector Castillo <hectorcastillo@comcast.net> wrote:

Hello partners
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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Regards,
Stu Rosen
201-446-1200
www.stoneshine.com
www.mbstonecare.com
www.mbstonepro.com
"EVERYTHING MATTERS" 


 
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