Black Glue On Concrete Floor

Asphalt based cutback adhesive remaining on a concrete floor after removing old vinyl tile and other flooring represents one of the most difficult and risky subfloors for the installation of new flooring.

Black glue on concrete floor.

Asphaltic cutback adhesive is black in color and is usually found beneath vinyl tiles and flooring. There are a few and each kind has its. The thing about tile adhesive is that there isn t just one kind. The same quality that makes tile adhesive so reliable can make it a real pain in the rear end when you want to install new tiles especially if the original floor is concrete.

Underneath on the concrete floor is the black mastic or glue referred to in this thread. Many modern mastics are latex or water based and can be softened with water. This poses serious health concern. Remove all dirt and debris using a stiff bristle broom.

As a petroleum based material the cutback is not softened by water. Mastic is the general term for a type of glue like flooring adhesive. Run the grinder over the glue in rows. If you do have black glue on your concrete floor and you don t know how old it is it could contain asbestos.

What is black mastic. Most vinyl tile flooring installed in the 60 s 70 s and early 80 s had asbestos in both the glue and the tiles. Seal all edges with tape. Depending on what type of flooring product is being installed on top of the cutback adhesive you do have some options.

The surface of the mastic is not broken but quite smooth. Asbestos was mixed with this product to make it more durable. Sweep the floor a second time to. An easy way to tell whether the floor is dry enough is to place a small piece of kitchen plastic wrap about 12 square to the surface of the concrete floor.

The removal of cutback using grinding sanding or blasting may contain asbestos. I am tiling mosaic and small pieces over what once was a concrete basement floor which on occasion in my city with all the rain can get flooded what was there when i bought the house 2 years ago was an asbestos linoleum 1 square very thin tile over a thin black mastic. How to paint over asphalt tile glue on concrete. I d rather encapsulate it with paint or.