Product information
Sikaflex 521 UV is a sealant with excellent adhesion and weather resistance. It is a non-sag and elastic 1-component universal sealant, based on a polyurethane hybrid compound that cures on contact with atmospheric moisture to form a durable elastomer. Suitable substrate materials are wood, metals, metal primers and varnish and paint layers (2-component systems), ceramic materials and plastics.
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