Sikaflex®-521 UV is a versatile, weather-resistant hybrid adhesive and sealant designed for both internal and external applications

It's excellent adhesion makes it suitable for bonding and sealing a wide range of materials, including timber, metals, painted surfaces, ceramics and many plastics

With excellent resistance to ageing and weathering, Sikaflex®-521 UV provides a durable, permanently elastic seal. It offers good adhesion without special pre-treatment on many substrates, while its low-odour, solvent-free and isocyanate-free formulation makes it a practical choice for a variety of applications

The product is non-corrosive, has high electrical resistance and can be sanded and overpainted once cured. Available in white, black and grey, Sikaflex®-521 UV is suitable for demanding indoor and outdoor sealing and bonding applications

Key Features & Benefits:

• Available colours: Black, Grey & White
• Solvent and isocyanate free
• Silicone and PVC free
• Weathering and ageing resistant
• Permanently elastic
• Excellent multi-substrate adhesion
• Approximately 30-minute tack-free time
• Low odour
• Sandable and overpaintable
• Non-corrosive

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Professional Use:

Sikaflex®-521 UV is intended for experienced professional users. Before application, testing should be carried out using the actual substrates and conditions to confirm adhesion, compatibility and suitability for the intended application, always follow the relevant manufacturer's technical documentation and application instructions before use

For plastics that may be susceptible to stress cracking, manufacturer compatibility advice should be obtained before use

Product Data Sheet available upon request