RainGuard Micro-Seal Silane / Siloxane Water Repellent is an invisible clear penetrating water repellent that is non-yellowing, low odor, zero VOC, and non-toxic. It is formulated to not be affected by weathering, salt, dirt, freezing temperatures, UV light, and wind-driven rain, among many other damaging elements. It dries down to a clear, invisible finish that does not change the surface texture or color. Ideal for use on uncoated/unpainted, vertical/horizontal, interior/exterior surfaces such as: concrete, brick, pavers, wood, porous natural and artificial stone, masonry, unglazed/unpainted porous tile, and color integrated or unpainted stucco.