Sikaflex®-521 UV is a durable, weather resistant multi-purpose sealant. Ideal for bonding solar panels to roofs & metal, wood, ceramic & plastic materials. No need for priming or special pre-treatment. This odour free sealant is non-corrosive, silicone, PVC & solvent free. Suitable for overpainting & sanding for a neat finish. Benefits: Will help to secure a panel to a variety of roofs & mounting brackets. Application: Use with DIY solar panels. Quality: Created by the world leading adhesive manufacturer Sikaflex.