Calcium zinc stabilizer for PVC foam board, also known as Ca/Zn heat stabilizer for PVC foam sheet, is one of the most important additives in the formulation of foam board. Without a stabilizer, PVC decomposes at extrusion temperatures and loses its color and mechanical properties. This stabilizer controls thermal degradation, keeps processing stable and protects the quality of the finished sheet. Our product is a blend of calcium and zinc salts designed specifically for PVC foam sheets, and it works in harmony with the foaming process and the other additives in the formulation. It contains no lead or cadmium and has fully replaced lead-based stabilizers in foam board production.

Key features include a white, bright finished sheet, a fine and uniform foam structure, suitable density and a smooth, stain-free surface. High thermal stability keeps the color steady during production and over the long term, with little yellowing. Sheets made with calcium zinc stabilizer have good mechanical properties and better resistance to sunlight and weathering. Using this system instead of lead also reduces environmental damage and health risks.

PVC foam board made with this stabilizer is used in construction and decoration, including advertising and signage, cabinets and interior decor, partitions, and wall and ceiling cladding. With this product, PVC foam sheet manufacturers can produce light, white, uniform boards with consistent quality from batch to batch. For orders, technical advice and help choosing the right grade for your line, contact us.

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