FlexSeal Membrane
Composite Sheet Air/Vapour-Barrier Membrane
Technical Performance Features
Vapour Permeance - 2.9 ng/Pa.s.m² (0.05 Perms)
Coverage

236 ft² per roll

NMS
07196
Description

FlexSeal Membrane Air/Vapour Barrier is a self-adhering, cold applied composite sheet membrane comprised of 0.9 mm (36 mils) of rubberized asphalt integrally bonded to a 0.1 mm (4 mils) film of high density, cross laminated polyethylene for a minimum thickness of 1.0 mm (40 mils). For ease of application FlexSeal Membrane Air/Vapour Barrier is inter-wound with a disposable silicone treated release paper. FlexSeal Membrane Air/Vapour Barrier is dark grey to black in colour.

Advantages
  • Excellent adhesion to various substrates.
  • Ideal for sprayed polyurethane foam insulation.
  • Self-sealing membrane ensuring continuous waterproofing.
  • Available in 36", 18", and 6" roll widths.
Uses

FlexSeal Membrane Air/Vapour Barrier is an air seal membrane designed to prevent the passage of air into or out of the building enclosures when incorporated with building envelope construction. FlexSeal Membrane Air/Vapour Barrier is suitable for use in a variety of wall assemblies and in combination with most construction materials including: concrete, masonry, metal and wood/gypsum sheathing.

Physical Properties
 
Coverage

In 914 mm (36 in) width rolls, average coverage of 21.90 m² (236 ft²) per roll. In 457 mm (18 in) width rolls, average coverage of 20.6 m² (222 ft²) per carton (2 rolls). Quantities based on side laps of 51 mm (2 in). For estimating purposes a wastage factor of 3% should be included to account for misaligned laps, reinforcing requirements and repairs.



Performance Properties
Method Results
Thickness

ASTM D3767 Method A

1 mm (40 mils)

Minimum Tensile Strength (Membrane)

ASTM D412 (die C) (Modified)

2.8 MPa (400 psi)

Minimum Tensile Strength (Film)

ASTM D412 (die C) (Modified)

34.5 MPa (5000 psi)

Minimum Elongation (To Failure of Rubberized Asphalt)

ASTM D412 (die C) (Modified)

200%

Pliability (1) @ -32°C (-25°F)

ASTM D1970

Pliability (1) @ -43°C (-45°F)

ASTM D1970

Pass

Crack Cycling, 6 mm (1/4 in) (2) @ -32°C (-25°F)

Durabond B136

No effect

Joint Cycling, 25 mm (1 in) (3) @ -26°C (-15°F)

Durabond B135

No effect

Minimum Puncture Resistance (Membrane)

ASTM E154

178 N (40 lbf)

Lap Peel Adhesion (4) @ 4°C (40°F)

ASTM D1876 (Modified)

-

Lap Peel Adhesion (4) @ -4°C (25°F)

ASTM D1876 (Modified)

1505 N/m width (8.6 lbf/in width)

Maximum Permeance to Water Vapour Transmission (Membrane)

ASTM 396 (Method B)

2.9 ng/Pa.s.m² (0.05 Perms)

Air Permeance of In Place Membrane [Air Pressure @75 Pa (0.02 in Hg)]

ASTM E283

0.000 08 L/s.m² (0.000 004ft³/min.ft²)

Resistance to 3000 Pa (0.89 in Hg)

ASTM E330

No change in air permeance value

Water Absorption (Weight gain @ 24 hrs)

ASTM D570

0.1%