I have tile and don't use any grout or adhesive- the adhesive may give off fumes when heated so I would say not- I use a thick shop paper towel under the tile to catch the watery urate- cleaning is easy w/ vinegar and water 50-50 solution and then I pull towel under neath if needed- replaced- those paper towels can be bought at walmart in autoHi, so I’m got slated tile for my beardies enclosures to use as a substrate. I accidentally got extra tile adhesive and was wondering if I could use it as a replacement for grout? Jut want to make sure it isn’t toxic for them.