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Butyl Tape NT

ME407 is a cold, self-adhesive membrane for vapour, air & watertight joints between exterior wall sections & load-bearing structures.


ME407 is used to make various joints and exterior wall sections internally vapour and airtight, externally watertight, and to create pressure equalisation in the exterior wall structure.

  • UV resistant film/backing
  • The adhesive layer remains flexible at high and extremely low temperatures and does not extrude
  • Does not cause staining on the substrate, so the adhesive layer does not dry out
  • Bonds to virtually all existing substrates
  • Does not require preheating before or during application
  • Provides permanent grip
  • Very high vapour tightness, hence watertight and airtight also

Usage Guidelines

  • Bonding surfaces must be clean, and free from grease and other contaminants that could affect a sound bond.
  • Bonding surfaces must be stable and free from loose material.
  • On highly porous substrates (concrete, cellular concrete, plasterwork, etc.) as well as butyl tape overlaps, we advise priming with ME901 or ME902 Butyl & Bitumen Primer.
  • To determine the width dimension of the illbruck ME407 Butyl Tape NT, the following general rule applies: the width of the joint plus 100 mm bonding surface (50 mm either side).
  • To determine the total length required, the following general rule applies: when joined together, ME407 Butyl Tape NT should have an overlap of at least 50 mm.


ME407 is a membrane made up of a laminate film with a pure butyl adhesive layer, lined with siliconised paper.


Roll Width (mm)Roll Thickness (mm)Rolls/Box
350 0.81

Technical data

Basic Bonding Layer Modified butyl rubber adhesive
Film (Backing Material) Cross laminated ALU/ HDPE film
Protective Film PE film, siliconised
Fire ClassDIN 4102B2 (normally flammable)
UV Weather Resistance Excellent
Water Vapour Permeability4108-3Water vapour tight (sd value ≥500 m)
Vapour Diffusion ResistanceEN1931 Method Bμ > 1,000,000
Staining on Building Materials Compatible with many substrates
Temperature Resistance -20°C to +80°C
Application Temperature +5°C to +40°C
Storage  Rolls must be stored lying flat and level, in dry and dust-free conditions between +5°C and +35°C
Shelf Life 2 years when stored as recommended in original unopened packaging
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