Product Data Sheet
|07 27 13|
DATA SHEET 7200-121
Self-Adhering Air/Vapour and Liquid Moisture Barrier
AIR-SHIELD self-adhering air/vapour and liquid moisture barrier is part of a total W. R. MEADOWS system to complete the building envelope. It is a roll-type product that is nominally 40 mils thick. The membrane’s controlled thickness is fabricated from cross-laminated polyethylene bonded to specially modified asphalt.
This unique, self-adhesive membrane, protected by a special release paper, is strong and durable. It remains flexible when surface mounted and will adhere to most primed surfaces at minimum temperatures of 4ºC (40ºF). The membrane provides excellent protection as a tough barrier or flashing that won’t shrink, sag, dry out, crack, or rot. It offers excellent resistance to punctures during installation. The self-healing characteristics of AIR-SHIELD facilitate recovery if minimal damage is sustained under normal use applications, i.e. when penetrated with self-tapping screws or nails.
AIR-SHIELD is packaged in rolls of 0.97 m x 22.86 m (38.5″ x 75′). AIR-SHIELD can also be cut to desired width.
Optional sizes include 10.1 cm (4″), 15.2 cm (6″), 22.8 cm (9″), 30.5 cm (12″), 40.6 cm (16″), 45.7 cm (18″), 50.8 cm (20″), and 61 cm (24″), all 22.86 m (75′) long.
AIR-SHIELD should be stored palletized and protected from rain and/or physical damage. Do not store at temperatures above 32.2°C (90°F) for extended periods of time. Do not leave membrane exposed to direct sunlight. Do not double-deck pallets. Store away from sparks or flames. Outdoors, store AIR-SHIELD on pallets and completely cover.
AIR-SHIELD self-adhering air/vapour barrier and liquid moisture barrier is designed for a variety of uses.
Primary applications include cavity wall and masonry wall construction. AIR-SHIELD works equally well as an air and/or vapour barrier on precast concrete, cast-in-place concrete, masonry (concrete block), interior and exterior gypsum board. Styrofoam, primed steel, aluminum mill finish, anodized aluminum, primed galvanized metal, drywall and plywood.
- Meets CAN/CGSB-51-33, Type I Water Vapour Permeance Requirements
- 2005 National Building Code of Canada
- ABAA Section 07261 Self-Adhering Air and Vapour Barrier Specification
MAINTAIN ENERGY EFFICIENCY
AIR-SHIELD provides an effective barrier to air exfiltration and infiltration, reducing condensation within the wall assembly, and increasing efficiency of a building’s mechanical system. Wet insulating materials lose much of their R-factor performance characteristics, reducing the energy efficiency of the structure. W. R. MEADOWS thermal and moisture protection products play a key role in maintaining the structure’s energy efficiency and aiding in the integrity of other structural systems, such as insulation.
|Thickness||40 mils (1 mm)|
|Pliability @ -32° C (-25° F)||No effect|
|Tensile Strength Film|
|ASTM D 412 modified (MD)||27.6 MPa (4,000 psi)|
|ASTM D 882 (MD)||4.1 N/mm (23.5 lb./in.)|
|ASTM D 412 modified (MD, %)||400 (Typical)|
|ASTM D 882 (MD, %)||400 Min.|
|ASTM E 154||178 N (40 lbf) Min.|
|Water Vapour Permeance (free film)|
|ASTM E-96, Procedure B||0.035 Perms|
|Water Absorption (% by weight)|
|ASTM D 1970||0.25 Max.|
|ASTM D 570-81||0.1 Max.|
|*Application Temperature||4º C (40° F) Min.|
|Low Temperature Flexibility @ -30º C (-22º F)|
|Service Temperature||-40º C – 70º C|
(-40º F – 158º F)
|Lap Peel Strength @ 4º C (39º F) (ASTM D 903, 180º Bend)||1.75 N/mm (10 lbf/in) width|
- Low permeability – prevents the transmission of air and inhibits moisture vapour through porous building materials.
- Provides a complete above-grade air, vapour, and water barrier on a variety of construction materials.
- Controlled thickness membrane is ideal for air barrier applications.
- Cross-laminated polyethylene film has excellent tensile strength, elongation, and tear resistance.
- Modified membrane is flexible at low temperatures.
- Excellent adhesion to prepared substrates of pre-cast concrete, cast-in-place concrete, masonry (concrete block), interior and exterior gypsum board, Styrofoam, primed steel, aluminum mill finish, anodized aluminum, primed galvanized metal, drywall, and plywood.
- Self-healing characteristics facilitate recovery if minimal damage is sustained under normal use applications.
- No flame required.
- Low temperature version also available – can be applied at temperatures between -7° C (20° F) and 16º C (60º F)
- AIR-SHIELD XLT can be applied at minimum temperatures of -18º C (0º F).
Air Leakage tested per ASTM E 283, ASTM E 2178-01, and ASTM E 2357
(National Building Code of Canada Requirement)
|Results for AIR-SHIELD||Air Leakage|
(National Building Code of Canada Requirement)
|75||1.57||0.02||Less than 0.02||0.004||Less than 0.004|
** Independent tests, available upon request
Surface Preparation… All surfaces to be protected must be clean, dry, frost-free, and smooth. Remove any sharp protrusions and repair all defects. All surfaces to receive AIR-SHIELD must be clean of oil, dust, and excess mortar. Strike masonry joints flush. Concrete surfaces must be smooth and without large voids, spalled areas, or sharp protrusions. Concrete must be cured a minimum of 14 days and must be dry before AIR-SHIELD is applied. Where curing compounds are used, they must be clear resin-based, without oil, wax or pigments. Prepare substrate per manufacturer’s instruction prior to application of membrane.
All surfaces to which AIR-SHIELD is to be applied must be addressed with either MEL-PRIME™ or MEL-PRIME W/B adhesive from W. R. MEADOWS. MEL-PRME may be applied to an area that is to be covered the same day. Uncovered areas must be re-addressed the next day. See container for complete application directions, drying information, and precautions.
Application Method… AIR-SHIELD self-adhesive air/vapour and liquid moisture barrier can be applied at minimum temperatures of 4º C (40º F). Apply membrane to surface addressed with MEL-PRIME by removing release paper and rolling membrane firmly into place. Remove release paper only as membrane is being applied. Ensure membrane is fully adhered and remove all wrinkles and/or fish mouths. Cut AIR-SHIELD membrane with a utility knife to detail around protrusions and masonry reinforcing. Seal all end laps and protrusions with POINTING MASTIC from W. R. MEADOWS. Overlap subsequent courses of membrane a minimum of 50.8 mm (2″). Vertical terminations of AIR-SHIELD should either be tied into the wall system or mechanically fastened with TERMINATION BAR from W. R. MEADOWS. AIR-SHIELD is not designed for permanent exposure. Good construction practices call for application of insulation as soon as possible to protect the air barrier.
When used as a flexible wall flashing, AIR-SHIELD should be recessed 13 mm (1/2″) from the face of the masonry. Flashing should not be permanently exposed to sunlight. Do not allow the rubberized asphalt surface of the flashing membrane to come in contact with sealants containing solvents, creosote, uncured coal tar products, EPDM, or PVC components.
Cleanup… Tools, etc. can be cleaned with mineral spirits, paint thinner or aromatic solvent.
Coverage is approximately 22.3 m² (240 ft.²). Net coverage when lapped 50 mm (2″) is 21.1 m² (228 ft.²).
SAFETY & TOXICITY
No adverse effects expected with normal product use. Cotton work gloves and safety goggles are recommended. Refer to Material Safety Data Sheet for complete health and safety information.
W. R. MEADOWS offers the following moisture and vapourproofing products, providing the specifying authority a single source system for the entire building envelope:
PREMOULDED MEMBRANE® VAPOR SEAL WITH PLASMATIC CORE® (PMPC) for horizontal vapourproofing applications. Refer to data sheet #7100-312.
MEL-ROL® waterproofing membrane. Refer to data sheet #7100-502.
MEL-ROL PRECON™ blindside/waterproofing membrane. Refer to data sheet #5118-050.
MEL-DRAIN™ rolled matrix drainage system is designed to protect vapourproofing and waterproofing membranes in either horizontal or vertical applications. Refer to data sheet #7100-205.
MEL-ROL LM single-component, water-based, polymer-modified, cold-applied waterproofing membrane. Refer to data sheet #7100-522.
PERMINATOR underslab vapor barrier. Refer to data sheet #7260-723.
MEL-PRIME W/B … This water-based adhesive prepares surfaces for AIR-SHIELD membrane application. Product is ready to use and requires no additional mixing. MEL-PRIME W/B emits no unpleasant odours and works with all waterproofing membranes from W. R. MEADOWS. Can be applied easily by manual spraying or with a roller. VOC- compliant. MEL-PRIME W/B is ideal for use at temperatures of 4° C (40° F) and above.
Coverage: 6.14 – 8.6 m²/L (250 – 350 ft.²/U.S. gallon)
Packaging: 3.79 Litre (1 U.S. Gallon) Units, 4/Carton and 18.93 Litre (5 U.S. gallon) Pails
MEL-PRIME … This solvent-based adhesive can be used at temperatures below 4° C (40° F) and above. Can be applied with a roller or brush.
Coverage: 6.14 – 7.4 m²/L (250 – 300 ft.²/U.S. gallon)
Packaging: 3.79 Litre (1 U.S. gallon) Cans and 18.93 Litre (5 U.S. Gallon) Pails
TERMINATION BAR … As an option, TERMINATION BAR may be used to mechanically fasten the membrane.
Packaging: (25) x 10′ (3.05 m) pieces per 20 lb. carton (250 lineal ft.)
POINTING MASTIC … Used for sealing exterior vertical and horizontal terminations, laps, around protrusions, and top edges of TERMINATION BAR.
Coverage: Approximately 61 metres (200 lineal feet) per 3.79 litres (1 U.S. gallon) when used as directed.
Packaging: 18.93 Litre (5 U.S. gallon) Pails or 857.65 mL (29 oz.) cartridges, 12/carton.
MASTERFORMAT NUMBER AND TITLE
07 27 13 – Modified Bituminous Sheet Air Barriers
May help contribute to LEED credits:
- EA Credit 1: Optimize Energy Performance
- IEQ Credit 3.1: Construction IAQ Management Plan: During Construction
- IEQ Credit 7.1: Thermal Comfort – Design
- MR Credit 2: Construction Waste Management
- MR Credit 5: Regional Materials