Sikaflex is more of an adhesive so more suitable to the bonding of solar panel mounts for example, Sikaflex 512 is more of a sealant and will stick to timber and is less prove to weathering so more suitable for the use in the bonding of awning rails etc.

What is the difference between Sikaflex 221 and 512?

Sikaflex is more of an adhesive so more suitable to the bonding of solar panel mounts for example, Sikaflex 512 is more of a sealant and will stick to timber and is less prove to weathering so more suitable for the use in the bonding of awning rails etc.

What's the difference between Sikaflex 512 and 522?

New replacement for Sikaflex 512. It has a high weathering and mould resistance. Sikaflex 522 meets highest EHS standards. It bonds well to a wide range of substrates with minimal pre-treatment. The market Leading sealant and adhesive for all your Motorhome and Caravan maintenance.