This definitely needs to be done for tile that is unglazed. Sealing the grout joints, though, is the most important thing, whether the tile is glazed or unglazed. If the grout joints were initially sealed right after installation, the sealer should be refreshed every two years or so.
Shower tiles should be sealed every one to two years, depending on how often the shower is used. A few additional items to look into are: cleaning tile showers correctly, checking shower grout, checking bathtub caulk, and regularly check the grout in your shower.
So a lot of people think a clear sealer will make grout more resistant to moisture and make it easier to clean. Sealer soaks into the grout and supposedly makes your tile and grout waterproof. People who want to sell you grout sealer will tell you it keeps it easier to clean, and helps prevent mildew from growing.
The grout in your shower should always be sealed; this will block any moisture that could easily enter the very porous material. A sealer will prevent water from becoming stuck behind the tile and grout, forming mold and mildew. Sealing your grout is not a lot of work. The protection it gives makes it even more worth it.
The First Step is to Thoroughly Clean your Grout: Using a coarse scrub pad and a bucket of clean water, remove all the loose grout and debris. Allow the grout to dry for the recommended time, typically around 45 minutes. You can also use a toothbrush to scrub the excess grout away and remove stains (if resealing old grout).
Does ceramic tile need to be sealed before grouting?
That being said, most ceramic tiles do not need to be sealed because they are not porous however the grout between the tiles is very porous and will stain.
You should be thinking “Should you seal granite tiles before grouting?”
Ceramic tile remains a popular flooring choice thanks to its durability and longevity. Porcelain is similar to ceramic tile in that the grout joints should definitely be sealed whether the tile is glazed or unglazed. Granite, quarry, marble, terrazzo, saltillo, and slate are helpfull too.
Do you seal ceramic tile before or after grouting?
Seal your raw stone tiles before grouting. If you don’t apply sealer first, grout will stick tenaciously to the tile surface, and it will be extremely difficult to get off. Grout may also discolor the unsealed tile. Some porous stone types may need two or three sealing coats before grouting.
Which grout is best for my tile?
Safe for most types of stone, ceramic tile, and grout. No-sheen, non-slippery finish. Safe in food-prep areas.
The brand may be called “red devil” – but this one is very nice and white. If you need your bathroom to look good and elegant, then this one is a very suitable choice.