Sealing grout... mosaic tiles

23 Oct 2007
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United Kingdom
I have a friend who has 4.5cm x 4.5cm mosaic tiles above her bath (there is an over-bath shower). She is wanting to seal the grout but this is going to be difficult because of the amount of grout lines, so I am looking for something I could use to put over the whole wall (both tiles and grout) without damaging the tiles.

The tiles are "Anti-slip glazed MGT Series MGT-193 Japan" (cant find anything about them online) she has the same ones on the floor, they have a rough surface a bit like worn sandpaper - don't seem glazed to me, but I guess they are.

Does this sound possible? can anyone recommend a suitable product?
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