Necoseal - Radon Barrier Membrane

Necoseal - Radon Barrier Membrane

Monarflex Necoseal is a virgin polyethylene membrane. When used as part of the Necoflex RAM System it provides an effective radon, air-tightness and moisture seal in the foundations of a new building. Necoseal should be used in conjunction with Easi-Load Radon DPC at all masonry walls.

Features & Benefits

  • High radon gas resistance.
  • High performance moisture vapour barrier.
  • Enhances the overall air-tightness performance of a building.
  • Fully compatible with the Necoflex RAM System.

Product Availability

Product Code Description Roll Size Roll Weight
3006659 Monarflex Necoseal 4m x 20m 22kg


Product Data and Performance

Monarflex Necoseal is a single layer, un-reinforced membrane made from a virgin blend of Low Density Polyethylene (LDPE).

Performance Data:
Colour: Black
Thickness: 0.3mm
Weight: 270g/m²
Tensile Strength: >345N/50mm
Tear Resistance: >190N
Moisture Vapour Transmission: <0.21 g/m²/day
Water Vapour Resistance: >990MNsg-1
Radon Gas Transmittance: 15x10-9 m/s-1
Radon Gas Permeability: 4.5x10-12 m2/s


    Necoflex - Ireland's most complete range of radon barrier membrane systems, scaffold sheeting,  temporary roof covers, debris netting and acoustic systems