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Miracle Sealants Phosphoric Acid Cleaner is designed for use on interior and exterior natural stone, pre-cast concrete pavers, concrete and masonry. Fast-acting cleaner formula helps remove grout and mortar residue, hard water deposits, rust and more.
From the Manufacturer
Cleaning for cast surfaces including pre-cast concrete, non-polished natural surfaces including flamed and honed granite, tumbled and honed marble, cleft and hone slate, quarry tile, flamed and honed limestone, unglazed ceramic tile, porcelain tile, cement grout, brick, concrete, mortar and masonry.
Bill
Reviewed in the United States on March 10, 2025
Definitely not full strength!!! Would not buy it again
Todd C Green
Reviewed in the United States on January 28, 2025
Did what it do
Customer
Reviewed in the United States on March 4, 2024
It got the job done! Grout haze 100% gone!!
Eliza Pelayo
Reviewed in the United States on May 10, 2023
I had new floor tiles installed and unfortunately, it always looked dirty because my less than ideal contractor was not diligent in cleaning grout residue. The grout haze in my kitchen floor tile was really bad that I considered getting my entire floors redone again. Thankfully, I found this product via a TikTok review. So glad I tried this, my floor is now devoid of its grout haze.
Customer
Reviewed in the United States on December 30, 2023
Had tile grout haze and they even left some chunks of dried grout. Tried several products from local stores, nothing else worked. This worked extreme well and got the job done!
Samantha Menio
Reviewed in the United States on October 21, 2023
Used this to help clean rusty parts for painting. After a few test pieces and different ratios. I found 50/50 mixed with a bit of dish soap in a spray bottle with a 10-15 minute soak worked best for me. Worked better then I expected, but not as well as I hoped-for.
Customer Review
Reviewed in the United States on September 24, 2019
I used this with about a third water added to it to treat my little old rusted lawn wagon. I tried finding the exact ingredients of this stuff, but all I got was that it is phosphoric acid with some hydrochloric acid added in. With a third in volume of water, it seemed active enough to convert rust, but not so much as to eat anything. It could probably be used straight, but mixing it down made it go a little further. Be safe! Mix water and acid the right way (look it up if you don’t know!) and wear breathing protection - do not directly breath the fumes, use it outside. Make sure to wear good acid resistant gloves and eye protection is an absolute must!Knock the heavier, crusty rust off with a good wire brushing. Spray until wet with the acid. Leave the stuff to convert the rust for a few days and then pressure wash with straight water. Paint as soon as the metal is dry or it may start rusting again.This stuff and any runoff will kill grass, so be careful where you use it.
Gail Dominicis
Reviewed in the United States on July 7, 2019
GOOD: cut it 3:1 with water and it makes an excellent rust remover - at a fraction of the stuff sold AS rust remover.BAD: don't let it sit overnight - takes paint off as well (which is a GOOD if that's what you are wanting to do)UGLY: should come in a 3 or 5 gal container instead of 1 gal jug
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