Sikaflex-521 UV is a one component PUR-Hybrid sealant based on the Sika Silane Terminated Polymer (STP) technology.
The product cures on exposure to atmospheric humidity to form a durable elastomer.
Sikaflex-521 UV is manufactured in accordance with ISO 9001 / 14001 quality assurance system and with the responsible care program.
- Ageing and weathering resistant
- Bonds well to a wide variety of substrates without the need for special pre-treatment
- Can be overpainted
- Can be sanded
- Low odor
- High electrical resistance
- Isocyanate- and solvent-free
- Silicone- and PVC-free
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-part systems), ceramic materials and plastics. Seek manufacturer’s advice before using on transparent materials that are prone to stress cracking.
This product is suitable for professional experienced users only.
Tests with actual substrates and conditions have to be performed to ensure adhesion and material compatibility.