7521 CrownPro AcidShield is a multifunctional phenol novolac epoxy resin that is extremely chemical resistant and has a high heat deflection temperature. 7521 CrownPro AcidShield is a self-priming, low viscosity novolac epoxy mortar binder and coating product designed to cure at ambient temperatures and to provide superior corrosion protection for surfaces subjected to severe chemical environments. It is designed for secondary containment. It is resistant to organic solvents, acids and alkaline reagents. See Chemical Resistant Chart Below. It can be applied directly over 8303 CrownShield MVB (moisture mitigation primer). It is VOC Compliant in all states and provinces in North America.