Premera AT1 QSE is a fast-drying, solvent based, water repellent sealer designed to enhance the surface and to protect stone, concrete & masonry surfaces from nature’s destructive forces, providing a long lasting barrier which exhibits superior resistance to water, mold, airborne dust and dirt, alkali, freeze/thaw damage and spills. (You can also stain and seal in one step by adding acetone based dyes into the sealer)