Black Diamond Ultimate Grout Cleaner: Best Cleaner for Tile,Ceramic,Porcelain, Marble Acid-Free Safe Deep Cleaner & Stain Remover for Even The Dirtiest Grout. (1-Quart/1-Brush)

Worked better than expected on shower grout. Used a scrubber with it and removed years of stains that I couldn't get rid of in the past.

I used this today in my filthy kitchen tile floor grout. It has years of built up grime. The floor is mopped on a weekly basis, but I cannot remember the last time. The grout had been properly cleaned.I sprayed the product on in sections and let it sit on there for five minutes. I then use the Rubbermaid grout scrubbing brush first and then I used an angled brush that I purchased separately for grout and scrubbed it very well wiped it all down mopped and then used a grout sealer and the results were amazing. Does take some manual labor to do, but it works excellent. Highly recommend there was not a strong odor and I used non-latex Mr. clean rubber gloves and had no issues.

Works great on soap scum but not so good on grout.

This product is amazing. Seriously. I moved into our home and the grout needed deep cleaning. This product is worth every penny. First buy a long handle grout brush, it is a necessity if you don’t like being on your hands and knees. Spray this product, let it work for about 5 min, scrub with grout brush. Rinse with a clean mop. Voila! White grout! I’m buying the sealer next!

Did an ok job, but not as well as some others said they experienced, even though I tried multiple times and let it set for a period of time.

This product is amazing! I moved into a condo with light tile and BROWN grout! I loved that the brush attached to a broomstick so I could use it without getting down on the floor. I left the product on 5 minutes and the grime came off so easily! I’m 72 and in good health, but, I was not looking forward to this project! So glad I read your reviews and chose Black Diamond!

Happy New Year 26 .. Love This Cleaner ... WOW !! years of black crud shower tile. see photos ... I've been living in this 80's built condo since 2011. The last few years tried EVERYTHING to clean the black around tiles / soft grout / caulk, whatever it's called. NO LUCK .. tried DYI' formulas, tried bleach scrub powder, bleach, mildew remover. NO LUCK. I bought drill attachment brush set a year or 2 ago also, did not help. TODAY, rec'd this product Amazon overnight. I relied on the reviews, best judgement ever on purchase. The brush included worked great on the corners, but I used the mentioned drill attachment for large areas. Yes bought Amazon a while ago, were quite cheap and paid off today. Just look at the nasty black leftovers in tub. 4 hours or more cleaning since the drill battery died after 10-15 minutes per round. Recommended!! I ordered a second bottle just now.

This grout cleaner is genuinely effective — it lifted years of dirt and grime that other cleaners barely touched! The quality of the cleaner itself is impressive, and the included brush makes it easier to get into tight grout lines. It’s definitely a powerful cleaner that delivers results without damaging tile. That said, the bottle design could be better. Mine had a bit of leakage during shipping, and the solution is slightly sticky when it dries if not fully wiped up. The smell is noticeable but not overwhelming — more “cleaning chemical” than fresh scent. The bottle and spray nozzle feel durable, though, and it should last a while. Overall, a great product for deep cleaning grout — just be mindful of the slight mess factor!

Excellent, you have to work with it, that is use an old tooth brush to work out the dirt cos it not magic, you wont be dissatisfied if you do your part.

Good product, quick delivery, would recommend

Used on grey grout it does work but took a few applications I found it easier to brush on lightly as solution strong and can damage other surfaces

I wasn't sure this product would work on the grout in my mudroom...but I trusted the reviews and am glad I did. This is very easy to use - and does work in 1-3 minutes!! I did my entire mudroom (10 x 12) with 1 spray bottle and it still has about 1/4 of the solution left. I did use a spin brush (Leebein spin scrubber with battery & USB charger) and a microfibre chenille mop for clean up (tried a swiffer but you need something bulky to get down in the grout lines to clean up). Be prepared to rinse your mop numerous times..you won't believe the dirt that comes out!

Buenísimo para limpiar las juntas de los azulejos o pisos de cerámica Me parece caro pero es muy bueno