Acratex® Roof Sealer SB is a solvent based, deep penetrating and consolidating sealer used for badly weathered concrete tiles or when high pressure cleaning exposes an underlying friable powdery layer. Not suitable where the surface is sound and well consolidated – Use Acratex® Roof Sealer WB in such cases. Available in Trade Outlets only, applying this product may require professional painter assistance. Check your local stockist for details.