Kilwaughter Chemical Co. Ltd produce Calcium Carbonate Lime Ca C03. Locally the product is known as Co. Antrim White Limestone due to its geographical position along the North Antrim Coast. Our product is predominantly used as external render (K Rend) for house rendering or plastering commercial buildings. The K Rend silicone range incorporates silicone water repellents as an integral part of the cement based render system, imparting a high degree of water repellency to the render surface.