RestorRxx Patio Sealer is a modified silicate solution that provides long-term waterproofing and durability benefits to concrete, masonry, brick pavers and patios. It penetrates into the surface and reacts with free calcium and water to form a calcium silicate gel complex in cracks, pores and capillaries. This gel creates a sub-surface barrier against the ingress of water and contaminants such as chloride ions.