The protective varnish based on Copal gum is a valuable solution in dental procedures, serving as an insulator for exposed dentine and offering a thermal barrier. It is indicated as an ideal cavity liner and dentinal tubule sealer, ensuring perfect protection for exposed dentine and reducing fluid penetration into the tooth. Additionally, it acts as an intermediary varnish before the insertion of amalgams, cements, or composites. The varnish’s fluoride content provides a thermal barrier for deep restorations, alleviating thermal sensitivity. With no thinners required, it boasts high fluidity for easy application and is compatible with most dental materials, including amalgams, cements, and composites. Overall, this Copal gum-based varnish offers reliable protection and thermal insulation for dental restorations.