Silca System is an American-made, UV stable product. The durable Silca Grate grids are designed to withstand freezing temperature and the harsh effects of the sun. Unlike deck boards which are known to warp, crack, distort, split, fade, and promote mold/mildew, natural stone and brick pavers are easily maintained and durable. Silca System enables you to install these heavy-duty materials on your deck, eliminating the need for the time-consuming labor and expense of sealing and staining a wooden deck.