Sealing new applications of External Wall Insulation (EWI) Systems to provide increased resistance to dirt pickup. Sealing older, weathered EWI Systems to renew original colour and reduce porosity. Provides a surface barrier to resist continued attack by acid rain and other pollutants. General sealing of porous materials such as brick, clay tile, quarry tile, block, porous stones, terracotta, render and concrete. Improves the freeze-thaw resistance of porous exterior surfaces by lowering water absorption and, at the same time, limiting the effect of acid rain and airborne soils. Priming older weathered EWI Systems prior to application of Dryvit decorative coatings.