500MR Mastic Remover For Concrete Gallon by BLUE BEAR

This product is very effective for removing 52 yr old black mastic from concrete. Follow the instructions and use a natural bristle brush (I used a deck style and attached to a broom handle to spread it) not a plastic one. In about an hour the stuff is ready to come up in most places. I have sensitive airways and this stuff did not bother me. To take up the product and mastic with it I have used a combo of cat litter and powdered oil absorber (which I would used a mask with), then cleaned up the residual oiliness with Dawn dish soap.

Followed the directions, but even after the 2 hour wait period, the glue still didn't come up. Have to go to specialty store and purchase another brand.

Loved it & used it to get the remaining mastic & paper backing from the time I took up. Came right off my concrete floors lickety split.