Sikaflex®-521 UV is a weathering-resitant, 1-component Silane Terminated Polymer (STP) sealant that cures on exposure to atmospheric humidity. This multipurpose product is suitable for internal and external sealing appications.
- Ageing and weathering resistant
- Bonds well to a wide variety of substrates without the need for special pre-treatment
- Can be painted
- Can be sanded
- Low odour
- Isocyanate- and solvent-free
- Silicone- and PVC-free