STONETECH Restore Acidic Cleaner, 1 Quart/32OZ (946ML) Bottle

OMG. I have tried bleach, commet & ammonia full strength while scrubbing with a utility brush. Nothing worked to brighten the grout lines in my floor.Then I found this, it worked so fast & easy. Pour it on a small section & scrub while wet you see results that fast. It worked so well I tried it on my shower that had a buildup of water stains & hard water. It took a little more scrubbing but I think because it ran off after spraying instead of being able to soak in. But it worked.

Bought a house with beautiful tile work in bathroom but there is some efflorescence. This did not work on it.

My quarry tile floor looks new again. This is a great product that is easy to use. I diluted it with water on a 1 to1 basis and only used a little bit at a time-just enough to wet the tiles. I then scrubbed the tiles and grout-followed by a rinse of clean water. When it dried, I resealed the floor. I never thought my floor would look this good again. The one quart was enough to do at least 400 sq feet.

It got my grout clean, but I still had to scrub every grout line by hand with a stiff brush.

It took some of the white haze off of the tile, but not enough to continue to use it. I ended up purchasing a penetrating grout color sealer to make the grout a dark brown, which was supposed to be the color. I don't think it is a problem of this product, but more a problem of how it was installed. This product did not work for me as I needed it to. It may work fine for people who have light colored grout.

We bought an existing home with a walk-in shower. The floor tiles were so discolored that we thought they might need replacement. Then we tried the Stonetech Restore acid cleaner. Wow! Perfectly clean tiles and grout. It did take a little elbow grease, but it's so worth the effort. The first shipment that I ordered got lost in transit, so Amazon refunded the cost, and the second order was here in 2 days.

I bought both the acid and alkaline cleaners from StoneTech to clean the 5 year old unsealed grout on my kitchen floor. The alkaline did OK (mixed at the highest concentation), but the acid did a better job. I am not a pro, but from what I have read, it is the type of dirt or stain that determines if the acid or the alkaline will do better. I wasn't sure, so I got a small amount of each. Acid won (and restored the grout to what it looks like in areas that have seen no foot traffic).

Applied the product three times and scrubbed. Even tried letting it sit for a while. Utterly USELESS! Don't waste your money!!!