800 Series Primer is a two-component, highly crosslinked vinyl ester priming system that penetrates into concrete and reduces porosity. It is applied to a properly prepared surface prior to the application of the appropriate Carboline lining system. The use of 800 Series Primer ensures a secure bond between the substrate and the lining system, reduces absorption of the lining system’s liquids by sealing concrete porosity and makes the overall application of the lining system easier.