sealant for tile and grout?

Old 06-14-02, 08:16 AM
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sealant for tile and grout?

I recently bought a home that was manufactured in '92. The master bath has a plastic jacuzzi tub that doubles as a shower. Around the perimeter of the tub and up the walls is white tile. Unfortunately, the tile was applied to standard white drywall, NOT greenboard. Fortunately, the tile is not exposed to too much water in this application due to the large size of the tub and the resultant distance from the shower's water stream; there is never any standing water. I was under the house and looked at the subfloor and joists and I saw no sign of moisture or water damage. I was thinking of applying regular bath caulking in a few places where cracks have formed in the grout. Also, I was thinking of using a weather sealer like Thompson's over the tile and grout to provide a little bit of a moisture barrier to reduce the likelihood of moisture penetrating the porous grout. Do I still have something to worry about? Should I strongly consider removing the tile and installing the proper backing? ALL ideas and opinions are welcome.
Old 06-14-02, 09:37 AM
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you should seal the grout using an appropriate grout sealer - see HD. This should be fine - I would not worry about removing the tile just because the underlyment is not 100% correct. normal drywall will last a while even if the tile above is getting wet contantly- which in your case it is not. let sleeping dogs lie

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