Most+

Name: Most+
Brand: NEXLER
SKU: W-PAM08-P1D2A-NX1R-0750

Heat-weldable bituminous felt

Application:

For use in traffic construction for waterproofing on concrete, reinforced concrete and prestressed concrete bridge decks of road engineering structures

Properties:

Double SBS modification
Durable and puncture-resistant
For use in reduced ambient temperatures
Flexible in a wide temperature range
Fixed by welding

Available packaging:

7,5 m, 45 m

Type of reinforcement	non-woven polyester
Top finishing	coarse grained
Width	1,00 ± 0,02 m
Thickness	≥ 5,0 mm
Thickness of the insulation layer under reinforcement	≥ 3,0 mm
Absorbency	≤ 0,5%
Permeability	≥ 0,8 MPa
Tensile breaking force¹⁾: - along the sheet - across the sheet	≥ 1100 N ≥ 800 N ¹⁾Determination at 23 ± 2°C.
Elongation at break¹⁾: - along the sheet - across the sheet	≥ 40% ≥ 45% ¹⁾Determination at 23 ± 2°C.
Tear breaking force²⁾: - along the sheet - across the sheet	≥ 200 N ≥ 200 N ²⁾Determination at 20 ± 2°C.
Breaking force at joints of bituminous felt sheets	≥ 500 N
Adhesion to substrate tested by the pull-off method²⁾	≥ 0,5 MPa ²⁾Determination at 20 ± 2°C.
Shear strength³⁾	≥ 0,2 MPa ²⁾NEXLER Most+ weldable bituminous felt applied on a primed concrete substrate (with an asphalt or resin-based agent) with a layer of mastic asphalt laid on top; shear at an angle of 15°.
Resistance to increased temperature, 100°C, 2 h	≥ 100°C
Polymer asphalt compound melted from NEXLER MOST+ weldable bituminous felt - softening point according to the PIK method, elastomeric asphalt (SBS) - fraass breaking point temperature - infrared analysis	≥ 90°C ≤ -20°C identification test
Tests of the Road and Bridge Research Institute [IBDiM] (RESEARCH REPORT No TN/M1-23/18/490/1): - softening point according to the PIK method - fraass breaking point temperature	139°C -32°C
Flexibility, tested on a Ø 30 mm roller	≤ -20°C
Reference document(s)	IBDiM-KOT-2019/0277 issue 3

Making an insulation using bituminous felt should be NEXLER Most+ carried out according to the technical design, in accordance with the current building regulations and the detailed guidelines for the design and execution of insulation contained in NEXLER Insulation Systems and the Technical Data Sheet.
The bituminous felt should be installed in ambient temperatures of above +5°C, this requirement applies to the time of day and night.
Do not carry out insulation work during strong winds and precipitation.
The quality assessment criteria for cement concrete substrates on which insulation may be installed are as follows:
- strong substrate (substrate strength tested using the "pull-off" method is at least 1,0 MPa),
- dry substrate (concrete is in air-dry condition, without visible traces of moisture and darkening caused by moisture); if the NEXLER EPOLIS EP 601 resin primer is used, insulation may also be installed on matt damp substrates, the concrete surface should be uniformly dark and matt, without light spots and water puddles,
- clean substrate (concrete surface is free from loose fractions, dust, oil stains, grease and other contaminants),
- smooth substrate (local unevenness and cavities on the concrete surface do not exceed ± 5 mm),
- even substrate (the gaps between the surface of the substrate and a 4 m long patch placed on the concrete substrate do not exceed 10 mm).
Before welding the NEXLER Most+ bituminous felt, the substrate must be primed.
NEXLER Most+ bituminous felt should be fixed by welding to a concrete substrate primed with an asphalt priming agent NEXLER Penetrator G7, NEXLER SBS BR or a resin priming agent, e.g. NEXLER EPOLIS EP 601 or another resin primer with a current National Technical Assessment issued by the IBDiM. 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 following types of paving can be laid directly on top of NEXLER Most+ bituminous felt insulation:
- mineral-asphalt mix (SMA) pavement,
- mechanically-laid mastic asphalt (MA) pavement,
- asphalt concrete (AC) pavement with a continuous grain size of 0 mm to 20 mm, including high-modulus asphalt concrete (HMAC).
On railway bridges, on sidewalks of road bridges and on surfaces of insulated structures intended to be covered with soil, protective layers must be installed on the insulation. The method of installing the protective layer for the insulation is specified in the design documentation.
Before use, please read the application details in the product's Technical Data Sheet.