I noticed one of the tiles above my gas fireplace had cracked and two large pieces were about to fall off, so I carefully removed them. This fireplace has not been used in several years so the cracks most likely developed/propagated due to wind or vibrations. We got a lot of wind here and now I can feel cold air coming in from behind the tile.
My questions:
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What type of adhesive does it look like was previously used here to attach the tiles to the metal enclosure of this gas fireplace?
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After scraping off the previous dried adhesive, what type of adhesive should I use to reattach these pieces?
I see recommendations here for "thin set with an admix", "moose milk" and refractory cement", but I'm not sure which to pursue. Ideally I'd like to be able to buy a small quantity of something (rather than a large bucket) online (and avoid having to go to a store).
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After the pieces have been reattached and have settled, if the cracks between the pieces are still visible and/or have air coming through, what could I use to apply into the crevice to ensure a seal? Preferably something clear or black to match the color of the tile.
Best Answer
I've had a similar situation and I found Liquid Nails for Marble and granite to work very well. It's also rated for use on metal. You can purchase it in single tubes and it's great for spot repairs on tile and granite. Just make sure the surface is cleaned and follow directions. Be sure to secure the tile in place until it dries.
I couldn't tell if there is grout between your tiles. Grout is prone to crack with vibration but I'm sure you'll want to match whatever is there. If you change what's between the tiles it may not match. If there is a gap, be sure to use spacers for a uniform gap on each side before you grout. Then all you do is match the grout color.
You can also use the Liquid Nails to join the pieces of tile before you mount them but if they are large pieces and the surface you're mounting it to is even you may not have to do that. Good luck.