The Zinsser® Plus System Mold & Mildew-Proof™* Commercial Wallcovering System is guaranteed to protect wallcovering investments against the growth of mold and mildew for 5 years. It consists of one primer, Shieldz® Universal Plus Primer, to prepare any surface for any type of wallcovering, and two 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.