This is a great product. I wanted to use non-corrosive sealant for my kitchen floor grout. It didn't change the colour of the grout and also hasn't change the look of the tiles which in the past has been darkened by sealants. Follow the instructions as required.
Used on white grout in our kitchen, which has turned brown over time. As per instructions leave on for 10min and scrub. Worked really well, also dont have a strong chemical smell to it. Strongly reccomend