How to clean sanded grout in shower

Last updated: October 26, 2026 8:00:00 AM

Scrub the sanded grout with a mixture of baking soda and warm water using a soft bristled brush. Rinse the area thoroughly with clean water and let it dry completely.

To clean sanded grout in a shower, you need to scrub away accumulated soap scum, mildew, and mineral deposits using a safe paste and a stiff-bristled brush. Rinse the area thoroughly with warm water and seal the clean joints to protect them from future moisture damage.

Sanded grout is a common choice for tile floors and walls because the added sand provides structural strength, preventing the mortar from shrinking and cracking over wider gaps. However, that same sand creates a slightly textured, porous surface that traps dirt and moisture much more easily than smooth tile. Because a shower is a high-humidity environment, this trapped grime quickly leads to discoloration and mold growth. Restoring the look of your shower requires a systematic approach that breaks down organic buildup without wearing away the mortar itself.

Gather Your Tools and Protect the Space

Before beginning any deep cleaning project in a bathroom, preparation is key to ensuring safety and efficiency. Clear all bottles, soaps, and bath accessories out of the shower stall so you have an unobstructed workspace. Put on a pair of rubber gloves to protect your skin from drying agents and cleaning residues, and ensure the bathroom is well-ventilated by turning on the exhaust fan or opening a window.

For this task, you will need a stiff-bristled scrub brush designed for tile work, a sponge, a bucket for mixing and rinsing water, and a microfiber towel. Avoid using metal scrapers or extremely abrasive steel wool, as these can scratch the surrounding tile and gouge the mortar joints, creating deeper pits where dirt will accumulate in the future.

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Harsh chemical bleach can damage certain types of tile and weaken the integrity of the mortar over time, so a natural, mildly abrasive paste is often the best choice for tackling stubborn shower grime. In a clean bucket or bowl, combine baking soda with enough hydrogen peroxide to form a thick, spreadable paste with the consistency of frosting.

Baking soda acts as a gentle abrasive that helps lift stains without scratching the surface, while the effervescent nature of hydrogen peroxide helps break down organic discoloration and mildew. If you do not have hydrogen peroxide on hand, warm water can be substituted to create the paste, though peroxide offers superior whitening properties for discolored lines. Mix only as much as you plan to use immediately, as the mixture loses its potency if left sitting for long periods.

Apply and Let the Solution Sit

Using your gloved fingers or a small plastic spatula, apply the baking soda and hydrogen peroxide paste directly along the lines of the mortar. Press the mixture firmly into the depressed channels so it makes full contact with the stained and discolored surfaces.

Allow the paste to sit undisturbed for a significant duration, typically around twenty to thirty minutes. During this time, the mixture will begin to bubble slightly as it lifts grease, soap residue, and mildew from the microscopic pores of the sand. Do not let the paste dry out completely, as a dried-up crust becomes much harder to rinse away. If the bathroom is exceptionally dry and the paste begins to dry too quickly, mist it lightly with a spray bottle filled with plain water to keep it active.

Scrub the Lines Gently

Once the waiting period has elapsed, take your stiff-bristled brush and begin working along the joints. Use firm, circular motions rather than harsh, back-and-forth sawing strokes, which can fray the bristles and cause uneven pressure. The bristles should be firm enough to reach into the textured surface created by the sand particles, but not so rigid that they chip the edges of the surrounding tile.

Pay special attention to corners, floor junctions, and lower wall sections where water pools and soap scum accumulates most heavily. You should notice the paste turning gray or brown as it lifts the embedded dirt out of the mortar. If certain dark spots or stubborn stains remain, apply a little extra paste directly to those specific trouble spots, let them sit for an additional ten minutes, and scrub them again.

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After scrubbing the entire shower, rinse the surfaces thoroughly to wash away the loosened grime and remaining baking soda residue. Fill your bucket with clean, warm water and use a large sponge to wipe down t BEST Definition & Meaning - Merriam-Webster 4 days ago · The meaning of BEST is excelling all others. How to use best in a sentence. he walls and floors, rinsing the sponge frequently. You can also use a handheld showerhead if your stall is equipped with one, directing a steady stream of water over all the cleaned areas.

Once the walls and floors are fully rinsed, dry them with a clean microfiber towel. Inspect the mortar closely under good lighting. If the shower has been neglected for a long time, a single cleaning session might not remove every deeply set stain. If you notice remaining discoloration, you may need to repeat the paste application process on those specific stubborn areas before moving on to the final protective step.

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The final and most crucial step in maintaining clean shower mortar is applying a liquid sealer. Because sanded mortar is inherently porous, leaving it unsealed invites moisture, soap, and mildew to sink right back into the material within a matter of weeks.

Ensure the shower is completely dry before applying a sealer, as trapping residual moisture underneath a sealant can lead to cloudiness or mold growth beneath the surface. This often means waiting twenty-four hours after your deep cleaning session to let the structure dry out entirely.

Purchase a penetrating liqu Disparition de mon entreprise de Google et Google Maps. Pourquoi, qui, comment? Mon numero de telephone sais integrée dans … id sealer designed specifically for masonry and tile joints. These sealers often come in a bottle with a sponge tip, a roller applicator, or a spray nozzle. Carefully apply the liquid directly along the lines, making sure it absorbs fully into the mortar without pooling heavily on the adjacent tile. Wipe away any excess sealer from the tile surface with a clean cloth before it dries, as dried sealer can leave an unsightly, sticky film on smooth surfaces.

Allow the sealer to cure according to the instructions provided by the manufacturer, which usually involves keeping the shower completely dry for at least twenty-four to forty-eight hours. Once cured, the sealant creates an invisible, water-repellent barrier that causes future moisture to bead up on the surface rather than soaking into the sand and cement.

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Preventing future buildup is much easier than undertaking a heavy restoration project. To keep your shower in top condition, develop a few simple habits after each use. Keep a small squeegee in the stall and take thirty seconds to wipe down the walls and floors after every shower. This removes the vast majority of lingering soapy water before it can evaporate and leave a crusty film behind.

Additionally, leave the bathroom door or shower curtain open after bathing to encourage airflow and lower the humidity in the room, which naturally discourages mildew growth. Once a week, give the walls a quick wipe down with a mild daily shower spray and a damp sponge. By combining these quick preventive habits with an annual deep cleaning and resealing routine, you will keep the mortar looking fresh, bright, and well-protected for years to come.