P & S PRIMER is used as a primer in conjunction with self-adhered, vapor permeable membranes for applications over substrates that are difficult to achieve adequate adhesion to without the primer. Use when applied to masonry, concrete, non-treated wood, drywall and metal, including polystyrenes (XPS-EPS) Dens- Glass- Gold polyisocyanurates and other substrates. Test for adhesion confirm suitability for a particular or non-familiar substrate material.