Product Data Sheet
|07 27 26|
DATA SHEET 5115-675
Self-Adhering Air/Vapour and Liquid Moisture Barrier
AIR-SHIELD XLT 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 and is ideal for cold weather applications. 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 -18° C. 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 XLT facilitate recovery if minimal damage is sustained under normal use applications; i.e., when penetrated with self-tapping screws or nails.
AIR-SHIELD XLT is packaged in rolls measuring 0.97 m (38.5″) x 22.86 m (75′). AIR-SHIELD XLT 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.
Coverage is approximately 22.3 m² (240 ft.2). Net coverage when lapped 51 mm (2″) is 21.1 m² (228 ft.2).
AIR-SHIELD XLT should be stored palletized and protected from rain and/or physical damage. Do not store at temperatures above 32.2º C 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 XLT on pallets and completely cover.
AIR-SHIELD XLT is designed for a variety of uses. Primary applications include cavity wall and masonry wall construction. AIR-SHIELD XLT 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.
- 2015 National Building Code of Canada
MAINTAIN ENERGY EFFICIENCY
AIR-SHIELD XLT provides an effective barrier to air exfiltration and infiltration, reducing condensation within the wall assembly and increasing the 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||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 D412 modified (MD, %)||400 (Typical)|
|ASTM D882 (MD, %)||400 Min.|
|ASTM E154||178 N (40 lbf) Min.|
|Water Vapour Permeance (free film)|
|ASTM E-96, Procedure B||0.035 Perms|
|Water Absorption (% by weight)|
|ASTM D1970||0.25 Max.|
|ASTM D570-81||0.1 Max.|
|Application Temperature||-18º C Min.|
|Low Temperature Flexibility |
@ (-22º F) (CGSB 37GP56m)
|Service Temperature||-40º – 70º C|
|Lap Peel Strength @ 4º C (ASTM D903, 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.
- Superior adhesion, even down to -18˚ C.
- 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 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.
- Self-healing characteristics facilitate recovery if minimal damage is sustained under normal use applications.
- No flame required.
Air Leakage (Tested per ASTME 283)
(National Building Code of Canada Requirement)
(National Building Code of Canada Requirement)
|Results for AIR-SHIELD XLT|
|Pa||lb./sq. ft.||L/S/m²||cfm/sq. ft.|
Surface Preparation … All surfaces to be protected must be clean, dry, frost-free, and smooth. Remove any sharp protrusions and repair all defects. Prepare substrate per manufacturer’s instruction prior to application of membrane.
All surfaces to receive AIR-SHIELD XLT 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 XLT is applied. Where curing compounds are used, they must be clear resin-based, without oil, wax, or pigments.
Surface Conditioning … All surfaces to which AIR-SHIELD XLT is to be applied must be addressed. MEL-PRIME™ W/B water-based primer can be used when temperatures are above 4º C. Use MEL-PRIME adhesive in colder weather and at higher application temperatures for maximum adhesion. MEL-PRIME may be applied with a roller to an area that is to be covered the same day. Uncovered areas must be re-applied the next day. See product container for complete application, drying information, and precautions.
Application Method … AIR-SHIELD XLT can be applied at minimum temperatures of -18º C. Apply membrane to addressed surface by removing the release paper and rolling the membrane firmly into place. Remove the release paper only as the membrane is being applied. Ensure the membrane is fully adhered and remove all wrinkles and/or fish mouths. Cut the 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 XLT should either be tied into the wall system or mechanically fastened with TERMINATION BAR from W. R. MEADOWS. AIR-SHIELD XLT is not designed for permanent exposure. Good construction practices call for application of insulation as soon as possible to protect the air barrier.
Cleanup … Tools, etc., can be cleaned with mineral spirits, paint thinner, or aromatic solvent.
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.
MEL-ROL® waterproofing membrane.
MEL-DRAIN™ rolled matrix drainage system is designed to protect the vapourproofing and waterproofing membranes in either horizontal or vertical applications.
MEL-PRIME W/B … Water-based adhesive prepares concrete surfaces for AIR-SHIELD XLT 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 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 down to -18° C and above. Can be applied by roller.
Coverage: 6.14 – 7.4 m²/L (250 – 300 ft.2/U.S. gallon)
Packaging: 3.79 Litre (1 U.S. gallon) Units and 18.93 Litre (5 U.S. gallon) Pails.
POINTING MASTIC … Used for sealing top edges of TERMINATION BAR.
Coverage: Approximately 61 meters (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.
HEALTH AND SAFETY
No adverse effects expected with normal product use. Cotton work gloves and safety goggles are recommended. Refer to Safety Data Sheet for complete health and safety information.
MASTERFORMAT NUMBER AND TITLE
07 27 13 – Modified Bituminous Sheet Air Barriers
May help contribute to LEED credits:
- EAp2: Minimum Energy Performance
- EAc2: Optimize Energy Performance
- MRc9: Construction and Demolition Waste Management
- EQc2: Low-Emitting Materials [For Healthcare and Schools (exterior-applied products) ONLY]