Pro Clima Tescon No 1 is a flexible, waterproof airtight tape designed to be used to seal overlaps, edges and penetrations on airtight and windtight breather membranes, where flexibility is desirable. The tape can also be used to adhere the membranes to other common surfaces, but may require a primer. The tape can be left exposed to weathering and UV for up to 6-months before applying final external finishes. Independently tested to adhere for 100 years. 60mm x 30m roll.