Profile: Protective Coatings Technology Inc. offers industrial coatings, ethyl benzene, coatings, and benzene. Our airLok flex is a poly-wall’s spray-on product, which is designed for superior, positive-side air and vapor protection on concrete, concrete masonry units as well as exterior gypsum sheathing & structures. Our poly-wall is a non-yellowing, UV-resistant, breathable sealer, which is used for exterior above-grade surfaces where water-resistance is needed.