I repaired cracks in concrete stairs with this product and it worked. Then painted it only to find paint doesn't stick to it. Called customer service to find a solution to the problem only to get a confirmation - paint does not adhere to it and my only solution is to remove all of it. No where in the can or product literature does it say NOT PAINTABLE. Now I have a big, fat mess on my hands that could have been avoided with the addition of two words to the label. I was warned not to eat it and I think the likelihood of painting it is far greater than than me eating it. Pretty stupid.