Sika Sikaflex-521 UV UV-Resistant Low Modulus Sealant - 10.3 oz - 106096

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 treatment. This multipurpose product is suitable for internal and external sealing applications.

Features:

• 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 painted
• Can be sanded
• Low odour

Specifications:

• Chemical Base: Silane Terminated Polymer
• Colour: White
• Cure Mechanism: Moisture-curing
• Density (uncured) depending on colour: 1.4 kg/L
• Non-sag Properties: Good
• Application Temperature (ambient): 5 - 40°C
• Skin Time: 30 minutes A
• Shrinkage: 2%
• Shore A Hardness: 40
• Tensile Strength: 1.8 MPa
• Elongation at break: 400 %
• Tear Propagation Resistance: 5.5 N/mm
• Service Temperature: -50°C - 90°C
  • 4 hours: 140°C
  • 1 hour: 150°C
• Shelf Life: 12 months
• CGP (Corporate Quality Procedure):
  • A)23°/50% r.h.
  • B)Storage below 25°C (77°F)

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
  • 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

Product Data Sheet

Safety Data Sheet