Bon Tool 32-373 Ironoxx - 722 Black - 10 Lb

This colorant worked great for my project. Maybe a little too good? I needed concrete in a rather dark gray. I followed the directions when mixing. I was starting with 150 pounds of dry concrete mix. I used 7 pounds of colorant to get the color I wanted. I mixed it in first dry, and the concrete mix appeared only slightly darker, so I was concerned that it would not end up dark enough. When I added the water, the mix became considerably darker, darker than I really intended. Once it dried, it became slightly darker again, nearly black. I would recommend making a small test batch with the ratio planned for the project, too see the color that results. I know I will be doing that in the future. The final color probably depends on the concrete mix, maybe even the water used. In any case, the colorant really does the job and the result is very uniform and excellent.

Did some tests and it seems very processional grade... it does what it states ... havent put it on however seems potent ... I will mix 6oz per gallon of water...

I tried to use this to make a light grey color out of 4000psi bagged concrete. I saw recommendations of 1lb per bag of concrete but i used 3/4 cup or about 4oz. The color came out a nice Chocolate BROWN, not black or gray...even though i used an extra scoop of portland which usually adds light gray color. I do believe that it would look almost black if it were more concentrated, buy definitely not gray. My advice is to spend the $10 to waste a bag and do a test pour! Let it dry for a day without water and observe the final color. There are cheap liquid pigments from home depot that have lamp black or other carbon instead of iron. These will indeed make a light grey but not redish or brown. Do your experiment, as concrete lasts decades ;)

Don’t bother buying if you are looking for a black concrete pigment. I bought this to pigment my concrete trays. I tried the first batch and it came out chocolate brown. Next batch was double the recommended quantity and it only became a darker chocolate brown. Not even a grey. Total waste of money if you ask me. I didn’t realize someone had left a review saying the same thing about it being brown.

Good product! Very well priced, I used it to make concrete dining table, the result is amazing!