Matte Ultramarine Blue Oxide Pigment Powder - 2.5Lb - Concrete Pigment, Cement Color Pigment, Resin Epoxy Dye, Colorant for Detergent, Plaster, Putty, Grout, Lime-Washing, Plastics 40Oz/1.13Kg

It is great to be able to change grout color with this pigment!

I mixed this with cement tile sealer to restore color to damaged cement tiles and it worked beautifully. The powder is so fine that it mixes instantly without clumping. The color shown is a true representation of the color in person.

I used it to mix with white grout on a mosaic piece and it worked great.

Worked well pretty color

Used this to stain concrete, great results

I'm glad I read the other reviews before I dove into a project with this. But before I'd done so, I opened up the first bag and encountered a little bit of a dusty puff of a chemical odor--not too strong, but enough to make me put off what I was doing and try to find some directions. I got Red Oxide. I turned off the fans, closed the window, put on a face mask and gloves, and laid down some newspaper. Then, I opened up that second bag, and added a 1/2 teaspoon of the powder to about a 1/4 cup of matte Mod Podge to paint some raw wood shadow boxes. A little does indeed go a long way. They dried perfectly. I put on a second coat, just to be on the safe side, but my project looks really nice. If this pigment came with instructions on how to prevent eye and lung injury, it would be a five-star product. But aside from that, the results are excellent.

Beautiful

This is NOT Ultramarine Blue - Ultramarine Blue is insoluble in water...