VAST-R® Nail sealing tape must be used to make roof membranes waterproof, when placed under (counter) battens on roof slopes less than 25°. VAST-R® Nail sealing tape is wider than standard (counter) battens, which means that the (counter) batten will not come into contact with the roof membrane. As a result, the batten will stay dry and water will not be able to enter through holes caused by screws or nails.

The surface must be dust-free to ensure effective bonding. VAST-R® Nail sealing tape cannot be applied if the surface is frozen. Put VAST-R® Nail sealing tape in vertical strips on the roof membrane. Then put (counter) battens in the middle of the VAST-R® Nail sealing tape so the VAST-R® Nail sealing tape is visible on both sides of the batten.