NEXLER Most+ bituminous felt should be fixed by welding to a concrete substrate primed with NEXLER Penetrator G7 bituminous primer or a resin primer, e.g. NEXLER EPOLIS EP 601. A substrate primed with a resin primer should not be re-primed with a bituminous primer and vice versa, a substrate primed with a bituminous primer should not be re-primed with a resin primer. The consumption of priming agents is specified in the product Technical Data Sheets.
Welding of the bituminous felt sheets should be carried out after the priming agent has completely dried (or cured).
As a result of heating both the substrate and the underside of the bituminous felt with a burner, the thin protective plastic foil melts, the asphalt is slightly melted and the bituminous felt sticks evenly to the substrate. The insulation of engineering structures particularly requires 100% bonding of the bituminous felt underside with the primed substrate. Maintain a bituminous felt overlap min. 8 cm wide along the length of the felt strip and an overlap min. 15 cm wide at the joint perpendicular to the length of the felt strip. Overlaps of the bituminous felt at joints perpendicular to the length of the bituminous felt on adjacent sheets should be offset from each other by at least 50 cm.
On railway bridge structures, pavements of road bridge structures and structures covered with soil, e.g. culverts, retaining walls, rear walls of bridge abutments, etc., protective layers should be made on the bituminous felt insulation, e.g. protective layers of cement concrete 5 cm thick, reinforced with a ø 6 mm mesh, with a mesh size of 15 cm x 15 cm.
NEXLER Most+ bituminous felt insulation is permissible to be made in two layers in the following areas: curbs or pavement surfaces and the places where the insulation is reinforced, except for the area under the bridge surface intended for motor vehicle traffic, i.e. the approach slab and the bridge slab, where the NEXLER Most+ bituminous felt insulation should be made in one layer.
The installation of the bridge deck pavement or protective insulation layer should be carried out as soon as possible. Any technological movement of people and vehicles on the insulation surface, not directly related to the installation of the protective layer or pavement, is prohibited until these layers are completed. Storage of materials and tools on the completed bituminous felt insulation, as well as parking of vehicles and construction machinery, is not permitted. The protective layer should be made according to the road design.

Before use, please read the application details in the product's Technical Data Sheet.

Documents for download

Declaration of Performance

Technical Data Sheet