The VILPE Underlay 2K seal is the only pass-through accessory on the market which guarantees that the roofing structures it is installed onto remain fully waterproof. Using the Underlay 2K seal also ensures that natural discontinuity points in the roofing material, combined with winds and driving snow, do not impose any extra humidity load on the roof structures. The Underlay 2K seal effectively seals the pass-through and the roof-covering into a single watertight and wind-tight component. Learn about the VILPE Underlay 2K seal by watching this installation video.