Data sheet
- 932727
SIKAFLEX
Sikaflex®-521 UV is a thixotropic, elastic multifunctional sealant based on a polyurethane hybrid polymer, which cures on exposure to atmospheric moisture to form a durable elastomer.
Sikaflex®-521 UV adheres well to a wide variety of substrates and is suitable for elastic sealing and bonding.
Suitable substrates are wood, metals, metal primers and paint systems (two-component), ceramic materials and plastics.
ADVANTAGES
- Resistant to aging and atmospheric exposure
- Adheres well to a wide range of substrates without the need for special pre-treatments
- Elastic
- Overpaintable
- Sandable
- Low odor emission
- Non-corrosive
- High electrical resistivity
- Free from isocyanates and solvents
- Free from silicone and PVC
TECHNICAL INFORMATION
- Color: White
- Cartridge: 300ml
- Hardening mechanism: atmospheric humidity
- Density (uncured) (CQP 006-4): approx. 1.4 kg/l
- Non-flow properties (thixotropy) (CQP 061-1): Good
- Application temperature: 5 to 40 °C
- Volumetric shrinkage (CQP 014-1): approximately 2%
- Shore A hardness (CQP 023-1 / ISO 868): approx. 40
- Tensile strength (CQP 036-1 / ISO 37): 1.8 N/mm
- Elongation at break (CQP 036-1 / ISO 37): approx. 400%
- Tear resistance (CQP 045-1 / ISO 34): 5.5 N/mm approx.
- Glass transition temperature (CQP 509-1 / ISO 4663): approx. -50°C
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