Sikaflex 521 UV is a weather-resistant, flexible polyurethane-based adhesive/sealant ideal for bonding solar panel brackets and cable glands to motorhomes, caravans, camper vans, boats and buildings.

• Ageing and weathering resistant
• Bonds well to a wide variety of substrates without the need for special pre-treatment
• Elastic
• Can be overpainted
• Can be sanded
• Low odor
• Non-corrosive
• High electrical resistance
• Isocyanate- and solvent-free
• Silicone- and PVC-free

This product cures on exposure to atmospheric humidity to form a durable elastomer.

We recommend thoroughly degreasing the two mating surfaces with panel wipes or similar prior to applying the sealant.

For use with a caulking gun.