Ionosit Baseliner is a stress breaker among dental materials. This light curing bioactive baseliner is a one-component liner material for composite restorations. Its active chemistry compensates for the shrinkage typical with composite fillings, prevents marginal gap formation, and, with that, minimizes postoperative sensitivity, microfractures and secondary caries. (2) 1.5gm Syringe, 20 Luer Lock Tips