7500 CrownPro AcidShield is a multifunctional phenol novolac resin that is extremely chemical resistant with a high heat deflection temperature. 7500 CrownPro AcidShield is a moderate viscosity thick film novolac lining designed to cure at ambient temperatures to provide superior corrosion protection for surfaces in severe chemical and physical environments. It can be applied directly over 8303 CrownShield MVB (moisture mitigation primer). It is VOC Compliant in all states and provinces in North America.