TheraCal LC® Pulp Protectant/LinerResin Modified Calcium Silicate Pulp Protectant Liner The award winning, next gen apatite stimulating liner and pulpal protectant, direct or indirect. Light curable and so easy to place like a flowable, Theracals unique chemistry is more effective and provides more user convenience than alternative materials like calcium hydroxide, glass ionomer, RMGI, IRM ZOE and other restorative materials used for lining or direct or indirect pulp capping. Curion