Sikaflex®-521 UV

Sikaflex-521 UV is a multi-purpose, non-sag, elastic, 1-component sealant based on a polyurethane-hybrid compound, that cures on exposure to atmospheric humidity to form a durable elastomer.

  • Bonds well to a wide variety of substrates without the need for special pre-treatment
  • Resistant to UV radiation
  • Solvent-free and very low VOC content
  • Silicone- and PVC-free
  • Isocyanate-free
  • High electrical resistance
  • Resistant to aging and weathering
  • Elastic
  • Low odour
  • One-part formulation