MAPEI ECO Prim Grip,ready-to-use, low-VOC, bond-promoting primer, enhances performance and adhesion of mortars to existing ceramics and difficult-to-bond-to substrates, improves bonding of self-leveling underlayments (SLUs) and bonds of render coats over cementitious substrates, easy, low-odor application 1 gallon (3.79l) jug