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I used concrete for my fireplace surround and hearth. I need to seal it because I have young kids who are prone to spilling EVERYTHING. The big box store sold me this grout sealer to use for this purpose. Is this safe to use, considering its going to get pretty hot? I'm worried about the heat causing chemicals to be released into the air. Its a gas insert, not wood burning.

If you do not believe this is a safe option, what do you suggest? I'm looking for most cost effective. Thanks!

Miracle Sealants Tile, Stone and Grout Sealer
 

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