Product Data Sheet

Sikaflex®-521 UV is a weathering-resistant 1component 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 treatment. This multipurpose product is suitable for internal and external sealing applications.

Product Benefits

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

Areas of Application

Sikaflex®-521 UV adheres well to a wide variety of substrates and is suitable for elastic sealing and bonding. Suitable substrate materials include timber, metals, metal primers and paint coatings (2-component systems), ceramic materials and plastics.

This multipurpose product is suitable for internal and external sealing applications. Seek manufacturer’s advice and perform tests on original substrates before using Sikaflex®521 UV on materials prone to stress cracking. This product is suitable for experienced professional users only. Test with actual substrates and conditions have to be performed to ensure adhesion and material compatibility