Sikaflex®-521 UV is a thixotropic, elastic multifunctional sealant based on a polyurethane hybrid polymer, which cures on exposure to atmospheric moisture to form a durable elastomer.
Sikaflex®-521 UV adheres well to a wide variety of substrates and is suitable for elastic sealing and bonding.
Suitable substrates are wood, metals, metal primers and paint systems (two-component), ceramic materials and plastics.
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