Polyflex® 422 is a professional high-quality one-component moisture-curing low modulus polyurethane sealant. It is a professional high-quality sealant based on polyurethane technology that cures by reacting to moisture to form a durable elastic rubber. Zwaluw Polyflex® 422 was developed as a sealant for connection and expansion joints in concrete, wood, metal, aluminium and PVC frames and masonry.
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