How to Seal the Grout in a Shower
Shower grout is exposed to frequent warmth and moisture, making it prone to mildew. Sealing the grout can help prevent mildew and will also make grout easier to clean.
Ideally, grout in bathroom areas is sealed shortly after the tile has been put in and the grout cured. If you are building your own home, or needed to replace existing grout, you can easily seal it yourself.
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Instructions
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1
Open windows and doors to ventilate the shower area. Many sealers have strong fumes.
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2
Clean grout as well as you can using, simply, soap and water. Let the grout dry and don your safety glasses and gloves.
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Start applying grout sealer evenly to the grout at the top of the shower wall. Some grout sealers can be sprayed on. Some sealers come in bottles with applicators and others require an additional applicator (purchased separately).
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Work your way down the wall, in sections, applying sealer evenly to the grout. Make certain you are applying sealer completely over all the grout--no gaps.
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Wet a sponge and sponge off excess sealer from tiles. Wipe tile surfaces dry with a towel (but make sure you don't disturb the freshly treated grout while you are doing this).
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Tips & Warnings
You shouldn't put the sealer on immediately after grouting. Depending on the dealer, you'll need to wait a few days or even a few weeks before sealing. Get the best, penetrating sealer you can fine. Especially for shower areas, you want a sealer that will be absorbed into the grout--not just one that lightly covers it.
Let the sealer dry completely before using the shower area. Do not apply sealer to fresh grout. It will not seal it properly. If you feel dizzy or lightheaded when applying the sealer, go get some fresh air immediately. Make sure to ventilate the area better before re-entering.
