Lead Mono Stabilizer is a lead-based heat stabilizer used in PVC processing to improve thermal stability, lubrication, and processing performance. Common grades include TBLS (Tribasic Lead Sulfate), DBLPh (Dibasic Lead Phthalate), and DBLS (Dibasic Lead Stearate). These stabilizers help protect PVC from heat degradation during extrusion and molding and are used in rigid and flexible PVC products such as pipes, profiles, sheets, flooring, and other durable applications.