The Zinsser Plus System Mold and Mildew-Proof Commercial Wall covering System is guaranteed to protect wall covering investments against the growth of mold and mildew for 5-years. It consists of 1 primer, Shield Universal Plus Primer, to prepare any surface for any type of wall covering and 2 adhesives, SureGrip Clear Plus and SureGrip Heavy Duty Clay Plus Adhesives. The Zinsser Plus System has been formulated to prevent problems caused by mold and mildew on the primer or adhesive such as adhesion failure, loose seams and curling edges or stains.