7 Best Grout Cleaners of 2026

ZEP is built for restoring old, neglected floors. This acidic formula is made to brighten light-colored grout lines that have turned gray or black over time.

It works by using strong acids to dissolve the top layer of grime and mineral deposits. You apply it, let it bubble for a few minutes, and then agitate it with a brush. The difference is often instant. The squirt top allows for precise application, so you do not waste product on the tile face.

However, power comes with risk. This is a heavy-duty chemical. It is not suitable for natural stone like marble, granite, or terrazzo, as the acid will etch the surface. You also need to be careful around chrome fixtures.

Soft Scrub with Bleach is a versatile gel that tackles tough stains on both horizontal and vertical surfaces. Because it is a thick gel, it clings to shower walls rather than running straight down the drain.

The bleach component kills mold and mildew spores while whitening the grout. It is non-abrasive, so it cleans without scratching your glossy tiles. Beyond grout, you can use this on sinks, toilets, and stovetops, making it a great all-in-one cleaner for under the sink.

Application is simple. Squeeze it onto the grout, let it sit for a minute to penetrate the stain, and then rinse. For deep discoloration, a quick scrub helps. Just be mindful of your clothes; the bleach will cause spotting if it splashes.

If your primary issue is black mold spots in your shower, Mold Armor is the solution. This instant mold and mildew remover is designed to kill fungi on contact without the need for heavy scrubbing.

The spray bottle makes it easy to coat large areas of tiled walls quickly. It uses a bleach-based formula to dissolve the mold and whiten the stain underneath. You simply spray it on, wait for the stain to disappear, and rinse it off.

It works fast, but it is also potent. The fumes are strong, so open a window and turn on the bathroom fan. It works on grout, fiberglass, vinyl, and even concrete, making it a versatile tool for damp areas.

Grout-EEZ is a heavy-duty alkaline cleaner designed for professional-style results at home. It comes as a complete kit, including the cleaning solution and a stiff-bristled brush that attaches to any standard broom handle.

This “stand-up” cleaning method saves your knees and back. You pour the liquid into the grout lines, let it sit for about 10 minutes to loosen the grease and dirt, and then scrub with the long-handled brush.

It is safe for porcelain and ceramic tiles but acts as a stripper. This means it will remove old sealers, so you must reseal your grout after using this product. It is an excellent choice for a deep, annual restoration clean.

Most heavy-duty grout cleaners rely on acid, which can etch marble, travertine, and other natural stone. Black Diamond takes a different route. Its acid-free formula lifts grease, soap scum, and ground-in grime without damaging stone, colored grout, or the finish on your tile.

Use is straightforward. You spray it on, give it one to three minutes to break down the dirt, agitate with the included brush, and rinse. The kit ships with a stiff stand-up style brush, so you are not hunting for a separate scrubber. Because it skips the harsh acids, there are no eye-watering fumes, and the bio-based formula is a safer choice in a home with kids or pets.

It is the pick for anyone with stone tile or colored grout who cannot risk an acidic brightener. Just know its limits: heavily soiled or very light grout can need a second pass, and it is not built to dissolve hard-water scale or calcium deposits, so pair it with a dedicated mineral remover for those.

When cleaning isn’t enough, you might need to recolor. Mapei Grout Refresh is essentially a paint and sealer in one. If your grout is permanently stained or you simply hate the color, this product lets you change it without regrouting.

It comes in a variety of colors to match or contrast with your tile. You apply a thin bead to the grout line and scrub it in with a toothbrush. Once it dries, you wipe away the excess from the tile face.

This product seals the grout as it colors, making it resistant to future stains and mold. It takes time and patience to apply, but the results look like a brand-new installation.

Keeping grout clean is easier when you do not let it get filthy in the first place. Zep Home Pro is built for that routine: a 2-in-1 foaming cleaner that lifts daily grime while leaving behind a protective layer. Its XtraGuard coating forms an invisible barrier that slows how fast dirt and stains take hold, so each future clean takes less work.

The foaming formula clings to vertical surfaces instead of running off, which helps on shower walls and backsplashes. It is gentle enough for frequent use on both white and tinted grout, and it is rated safe for ceramic and porcelain tile, granite, and quartz. A Mountain Drop scent replaces the usual bleach smell.

Think of this as the upkeep cleaner rather than the restorer. It is not meant to rescue years of black, set-in staining; for that, hit the grout with an acidic brightener first, then switch to this to keep it looking clean. Some users also note the foam can be inconsistent, so let it dwell and dry fully for the best result.