Grout Sealing

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Grout Sealing

How To: Seal Grout​

Make it easier to keep your bathroom sparkling by following these basic actions to seal your grout.

Even when you keep your bathroom tiles clean, dirty grout lines can really detract from the appearance of your tiled walls and floors. Because grout, not or whether sanded, is porous by nature, cause discoloration and compounds like chlorine, oil, and water have a tendency to seep inside. The best way to prevent this is to seal your new grout and repeat as needed–every year or so for wall and floor tiles that don’t get much moisture, and often for grout in the shower or on the bathroom backsplash. Adhere to the following directions , though, and you’ll discover create a dependable barrier against a dingy appearance and unsightly stains and how to seal grout. You may never need to scrub those lines that are grout !


  • Toothbrush
  • Dish soap
  • Vinegar
  • Grout sealer
  • Sponge or small brush (optional)
  • Cloth

STEP 1: Clean and fix grout.

Before applying a sealer, make sure you clean your grout thoroughly and fix any cracks or crumbles in the grout lines. You’ll seal in seams that are damaged and dirt. Scrub away as much of the dirt with a toothbrush dipped in water. (Switch into a 50-50 vinegar and warm water solution if you’re trying to eliminate stains.) Tackle one grout line. When you’re finished cleaning the grout, allow the area to dry for 45 minutes before sealing.

STEP 2: Choose your sealer.

Next, choose your sealer depending on the type of tile you’ve got and its location. No one sealer is most appropriate for all situations. The wide variety of products allows for a certain degree of customization as you’ll see when you get to your home improvement store. Labels specify which sealers work best with stone, marble, and ceramic tiles, in addition to how much moisture that the sealer can endure, be it high moisture from the low or shower moisture along a kitchen backsplash.

Depending on your tile and its location, you can narrow down the choices to two chief categories: penetrating sealers and membrane-forming sealers.

Penetrating sealers use a mineral or water spirit base that allows the formula’s tiny particles of silicone or latex penetrate the granular structure of the grout. As the sealer is absorbed by the grout, the particles of silicone and latex fill keeping out moisture. These sealers are the ideal choice for use in damp areas, such as showers bathrooms and, in particular.

Membrane-forming sealers make a coating on the surface of the grout which resists water permeation. (These sealers work well in the kitchen but should not be used in the toilet; membrane-forming sealers won’t allow water that’s trapped beneath the tile to evaporate, which, in a swampy shower, could cause mould.) These sealers also often feature pigments, so you can alter the color. While membrane-forming sealers are good for tile like rock, they won’t adhere to glazed tiles, such as most ceramics.

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STEP 3: Choose your sealer applicator.

Pick the applicator tool that’s appropriate for you. There are a few instances in which they may not be the best choice for your project although aerosol sealers are used for reasons of convenience:

When you have very thin grout lines and unsealed tiles, a sponge lets you seal larger parts of your toilet (walls or floors) easily by wiping over both surfaces simultaneously.

For glazed tiles where sealer won’t adhere, you’ll need to seal just the grout lines with an applicator brush or specialty applicator bottle with a rolling wheel on top.

Whichever tool you choose, read the manufacturer’s instructions on how to seal grout before you begin.

STEP 4: Apply sealer slowly and deliberately.

Apply sealer in small areas at a time, working left to right. By working your grout lines will seem more consistent and your sealer will provide better protection! Keep a cloth close by to wipe off the excess sealer. Whether you’re sponging over a large area or using an applicator to prevent drips on glazed tile, you’ll want to remove the sealer in the tile until it starts to dry (within five to seven minutes of program ) so that you’re not left with a foggy film that’s nearly impossible to eliminate.

STEP 5: Apply a second coat of sealer.

As soon as you’re done with the first coat, let it dry for an hour before applying a second. (Generally speaking, it takes a few coats of sealer to achieve adequate protection.)

After the second coat dries, test the surface with a few drops of water. The liquid should bead up into droplets; if not, apply a coat to guarantee quality results.

Finally, let your tiled area dry completely. While others can take up to 48 hours check the manufacturer’s instructions some sealers require only 24 hours to heal. While it may be inconvenient to maintain a room off-limits for a day or two, remind yourself how convenient it’s going to be the next time. A sealer means less time scrubbing, so this is one chore that will make your bathroom that is routine cleaning a breeze.

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