Bitumen felt PERFADER

Perforated underlay for partially bonded system . The partial bonding of the waterproofing is secured by the ratio of the perforations and the anti-adherent polyester underface of PERFADER. MAIN USES Partial bonding waterproofing underlay, for torch applied systems. Underlay for car-park roof waterproofing system. Underlay for granule finished systems for inaccessible roofs. DESCRIPTION Perforated bitumen underlay, silica sand surfaced, polyester film underfaced. Rolls: 20 x 1 m. Weight: 1 kg/m².