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· Tileguy
10,718 Posts
You can't keep it from running over the edge unless you have provided something for the purpose. Those products are intended to run over an edge.

The air bubbles come from two sources. Usually the mixing process. But sometimes the substrate being covered will have the ability to off-gas and create bubbles as the liquid traps the air beow.

The way to get the bubbles out is to use heat from a torch to draw them to the surface where they will simply pop when they arrive. Don't scortch the chemical.:) And don't wait too long to draw out the bubbles.:)
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