AT-PENETRACE has been designed for preparation of absorbent foundation (plasters, concrete, dry walls, and fiber gypsum boards ect.) before AERO-THERM® thermo active coating application. It forms an adhesive layer on top of absorbent materials and lowers their absorbency. AT-PENETRACE is ready for use, it doesn´t need to be diluted. A surface of the material treated must be cohesive, greaseless, free of dust and other impurities.