Copaliner protects the dentin and penetrates, fills, and seals the tubuli. It insulates against thermal, galvanic reaction and electrical shock. Copaliner’s ability to provide a marginal seal between the dentin and amalgam helps to protect against penetration into the cavity of oral fluids, micro organisms and metallic ions from amalgam restorations. Its non-chloroform formula is virtually insoluble in the oral environment. Copaliner is ether-based with a biologically mild formula, minimizing post-operative sensitivity.