Adhesive and sealing compound, Sikaflex-521UV, 300ml, white

Weathering-resistant STP adhesive sealant with a wide adhesion range.

Especially suitable for installing roof fans and roof windows.

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 applicatio

Product benefits:

* 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

Usage:

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. Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.

Typical product data:

Chemical base: Silane Terminated Polymer
Colour (CQP001-1): White, grey, black
Cure mechanism: Moisture-curing
Density (uncured): depending on color 1.4 kg/l
Non-sag properties: Good
Application temperature: ambient 5 ─ 40 °C
Skin time (CQP019-1): 30 minutes A
Curing speed (CQP049-1): (see diagram)
Shrinkage (CQP014-1): 2 %
Shore A hardness (CQP023-1 / ISO 48-4): 40
Tensile strength (CQP036-1 / ISO 527): 1.8 MPa
Elongation at break (CQP036-1 / ISO 527): 400 %
Tear propagation resistance (CQP045-1 / ISO 34): 5.5 N/mm
Service temperature (CQP513-1): -50 ─ 90 °C
Shelf life: 12 months