duoMatrix–C is a polymer additive that enhances the physical and performance properties of cementitious materials such as portland cements and mortars. duoMatrix–C eliminates the need for the usual 7-day post cure. It drastically reduces water and salt absorption and fills in micro cracks to minimize crack propagation. Other performance characteristics include greatly enhanced freeze/thaw, ultra-violet, and chemical resistance. Higher flexural strength reduces brittleness. duoMatrix-C is easy to use and can be introduced to any aggregate mix. It is usually cast solid or mixed with chopped fiber and sprayed. duoMatrix-C can be pigmented and improves color uniformity.