Black Diamond Stoneworks Ultimate Grout Cleaner for Tile & Grout, Quart Spray + Brush — Acid-Free, Stone-Safe

Black Diamond Stoneworks Ultimate Grout Cleaner is a professional-strength, acid-free spray that lifts deep grime and stains from grout and tile without harming marble, granite, or natural stone.

Keep tile surfaces looking like new without risking etching or discoloration. This easy-to-use formula targets dirt, grease, soap scum, and everyday buildup on grout lines while remaining non-acidic and safe for delicate stone and colored grout. The kit format includes a spray-ready quart and a scrub brush to speed up cleaning and restore contrast between grout and tile.

How quickly does the cleaner work on stubborn grout stains?

The formula penetrates into grout to loosen dirt and stains in minutes, allowing efficient agitation and rinsing for visible improvement on the first treatment. For heavy buildup, a short repeat application and brushing will further lift trapped grime without aggressive scrubbing.

• Penetration time: allow about 1–3 minutes for light soils; up to 13 minutes for heavier stains.
• Agitation: use the included brush to break up embedded dirt.
• Repeatability: safe to reapply as needed without acid damage.

Is this safe to use on natural stone like marble and granite?

Yes — the non-acidic formula is designed to clean grout adjacent to marble, granite, travertine, and other sensitive surfaces without etching or dulling the finish. It avoids the pH extremes of acid-based cleaners that can harm stone while still delivering professional-strength cleaning power.

• Stone-safe: engineered for marble, granite, travertine, and limestone.
• Color-safe: won't bleach or discolor pigmented grout.
• Surface protection: cleans without degrading sealers or polished finishes when rinsed properly.

How do I use the quart spray and brush for best results?

Spray the cleaner evenly onto grout and tile, let it dwell to loosen soils, scrub grout lines with the brush, then rinse thoroughly. Minimal effort is required for routine maintenance; heavier areas may need a second pass or a short soak before scrubbing.

• Application: spray directly onto grout and surrounding tile.
• Dwell time: 1–13 minutes depending on soil level — do not allow to dry.
• Finish: agitate with a brush, then rinse with clean water and wipe dry.

Will this cleaner harm colored grout or sealants?

The acid-free formulation is formulated to preserve colored grout pigments and is gentle on most grout sealants when used and rinsed as directed. For newly sealed or untreated grout, test in an inconspicuous spot first to confirm compatibility.

• Colored grout: safe for pigmented grout lines when used per instructions.
• Sealant caution: rinse thoroughly to avoid residue on sealed surfaces.
• Spot test: recommended for newly sealed or sensitive installations.

Who is this for? Homeowners, facility managers, and professional cleaners who need a reliable, non-acid grout cleaner that balances strong stain-lifting performance with surface safety. It’s ideal for bathrooms, kitchens, showers, tile floors, and any tiled area with visible grout discoloration where stone or colored grout must be protected. Choose Black Diamond Stoneworks Ultimate Grout Cleaner when you want noticeable results without the risks of acid-based products.

Ingredients

Cleaner