I made an outdoor countertop but didn't seal it. I installed them. Used water and wet the surface. The color was perfectly even. I got asked to make another piece and when I came to install this piece 3 days later the owner had sealed them.
I'm puzzled because this has never happened when I seal them. I always start with Grey slurry and slowly add color till it makes the wet top. I have done many pieces this way and have never seen this happen .
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