Stain Block Elite is a state of the art water and stain resistant penetrating impregnating sealer specifically designed for dense concrete, brick and masonry surfaces. When dry it is virtually invisible leaving the surface with its original appearance and breathability. It resists oil and grease stains, rust stains, moss, mildew and spalling problems associated with freeze/thaw cycles. Stain Block Elite provides superior protection against moisture penetration, thereby reducing the formation of efflorescence. It is designed for use on dense surfaces such as marble, granite, limestone, travertine, polished or tumbled stones, concrete, brick, pavers, slate, precast concrete, tile and man made and natural stone.