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Remove existing silicon, with a suitable scraper tool, knife or spatula. Clean the area with methylated spirits, bleach or your preferred cleaner. The idea is to kill any mould or similar under the silicon before applying. Use a suitable silicon product, e.g with mould inhibitors for bathroom/kitchens. Cut the sealant tube tip so the bead is wide enough to ...


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You should seal that hole to keep vermin from passing through and to insulate. Any traps (the "u" or "p"-shaped drain fixtures that maintain a water-seal to prevent sewer gases from venting into your home) should be prevented from freezing, but those are usually located under the sink fixture outside of the wall. Some bathtubs and showers may be an exception ...


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I'd suggest you get a small tub of premixed grout, a float, a sponge, and spend an hour fixing the problem. Be sure to remove any loose grout. (Something as simple as a utility knife will work for this. Wear gloves to avoid skinned knuckles.) If you want an even more durable job, score all of the existing grout along the edge of the tile (so 2 cuts per grout ...



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