QUESTIONChanging the Grout Color - I want to change the color of my grout in my kitchen. I was told to paint it with acrylic latex paint, will this work? Is Hi-gloss ok to use?
ANSWERANSWER - You should not use a latex paint over your existing grout joints, because it won't provide adequate coverage over the existing color, nor will it last.
There are special products called "Grout Colorants" made for painting over grout joints that are epoxy based. There are several manufacturers of these products who match the colors of cement grouts for ceramic tile and stone. You can go to the Cleaner and Sealers section under Resources in Expert Answers for a list of some of the manufacturers. Aqua Mix Grout Colorant is one of the better known products available.
Be sure to follow their instructions of fully cleaning the grout joints before applying. Good Luck!