Sikaflex®-521 UV

Weathering-resistant STP adhesive sealant with a wide adhesion range

Sikaflex®-521 UV is a weathering-resistant 1-component Silane Terminated Polymer (STP) adhesive / sealant that bonds well to a wide variety of bonding surfaces such as metals, ABS, PC, FRP and wood with usually no need for special pre-treatment. This multipurpose product is suitable for internal and external sealing applications.  

  • Ageing and weathering-resistant
  • Bonds well to a wide variety of substrates without the need for special pre-treatment
  • Isocyanate- and solvent-free
  • Can be overpainted
  • Can be sanded
  • Low odour