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DESCRIPTION
AIR-SHIELD LMP is a water-based air/liquid
moisture barrier that cures to form a tough,
seamless, elastomeric membrane. AIR-SHIELD
LMP exhibits excellent resistance to air leakage.
When properly applied as a drainage plane, AIR-SHIELD
LMP prohibits liquid water intrusion
into the substrate.
USES
AIR-SHIELD LMP has been specifically
formulated to act as an air and liquid moisture
barrier, allowing vapor to pass through it. It may
be applied to most common surfaces and
integrated into various wall systems. AIRSHIELD
LMP is suitable for both new
construction and retrofit applications.
| SPECIFICATIONS |
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| FEATURES/BENEFITS |
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SHELF LIFE (TYPICAL)
Twelve (12) months in original, unopened
container. Store at 40° - 90° F.
PACKAGING
5 Gallon (18.93 Liter) Pails
55 Gallon (208 Liter) Drums
| Solids Content, % Color |
58 Grey (Black – special order only) |
| Flexibility
@ -20° C (-26° C) (ASTM C836) Elongation (ASTM D 412), % Water Vapor Permeance (ASTM E-96, Procedure B) Perms: |
PASS 1200 12 |
| Service Temperature Nail Sealability (ASTM 1970) |
Not to exceed 175°
F (80° C) Pass |
| Storage and Application Temperature of AIR-SHIELD LMP For Roller Application: For Spray Application: |
40 - 90° F (4 - 32° C) 60 - 90° F (16 - 32° C) |
| Air/Substrate Temperature (At Time of Application): |
> 40° F (4° C) |
| Pressure | Air Leakage (ABAA requirement) |
Results for AIR-SHIELD LMP |
Air Leakage (ABAA requirement) |
Results for AIR-SHIELD LMP |
|
| Pa | lb./ ft.² | L/sM² | L/sM² | cfm/ ft.² | cfm/ ft.² |
| 75 | 1.57 | 0.02 | < 0.02 | 0.004 | < 0.004 |
* Independent tests available upon request.
| LEED INFORMATION May help contribute to LEED credits: |
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APPLICATION
Surface Preparation...All surfaces must be clean (free of
all coatings and curing compounds), free of frost, structurally
sound and relatively smooth. AIR-SHIELD LMP can be
applied to “green” or damp concrete if there is no liquid
water on the surface. Prepare substrate per manufacturer’s
instruction prior to membrane application.
Exterior Sheathing Panels... Exterior sheathing panels are to be fastened as per manufacturer’s recommendation. Joints in the panels <1/4” should be pretreated with a coat of AIR-SHIELD LMP prior to application of the membrane. Joints ¼” or greater in exterior sheathing panels [drywall, plywood, oriented strand board (OSB), and glass-faced wallboards, such as DensGlass Gold®] should be taped with a minimum 2” wide contractors mesh-style wallboard tape, suitable caulk, such as an acrylic latex, or 4” wide strip of AIR-SHIELD. (This method requires the use of MEL-PRIME™ or MEL-PRIME W/B prior to installation.)
Details and Protrusions … Before application of AIR-SHIELD LMP, apply a 6” (152 mm) minimum wide strip (lapped 3” on each side) of AIR-SHIELD where joints between dissimilar building materials occur, i.e. details around doors and windows, as well as protrusions. Architectural details are available online at www.wrmeadows.com or by calling 1-800-342-5976.
Concrete Masonry Units … Before applying AIR-SHIELD LMP to CMU surfaces, patch all cracks, protrusions, small voids, offsets, details, irregularities and small deformities with MEADOW-PATCH® 5 or MEADOW-PATCH 20 at least two hours before application.
Appearance … AIR-SHIELD LMP (gray) will dry gray in color. AIR-SHIELD LMP (black) appears dark gray in the container, but the dried film will be black.
Temperature/Conditions … Apply AIR-SHIELD LMP at air and surface temperatures of 40° F and higher. Curing/drying times are dependent on air temperature, airflow, relative humidity, substrate temperature, etc., specific to each individual application. Typical results are:
Tack-free time: 2 hours
Full cure: 48 hours
Roller … AIR-SHIELD LMP can be applied directly from the container; a ¾” nap roller is recommended. Apply AIR-SHIELD LMP on a vertical surface, in multiple coats if necessary, to achieve a final film thickness of 90 mils wet (45 mils dry). NOTE: While the proper film thickness may be achieved with a single coat, multiple coats may be necessary if the material slumps due to temperature and/or substrate conditions. Allow each previous coat to dry (approximately one hour) prior to applying the next coat.
Sprayer … AIR-SHIELD LMP should be stored and maintained at a temperature of 60° F or higher throughout the entire spray application. The product will become thick and difficult to spray at temperatures below 60° F. Note: Use of Graco HydraMax 350 or Graco GH833 is recommended for optimum performance. A Graco heavy duty texture gun with either a 0.051” (Graco GHD 551), 0.035” (Graco GHD 535), or 0.037” (Graco GHD 537) spray tip is recommended. If cratering occurs, the GHD 535 or 537 is recommended for a smoother finish.
Spray AIR-SHIELD LMP on a vertical surface, in multiple coats if necessary, to achieve a final film thickness of 90 mils wet (45 mils dry). NOTE: While the proper film thickness may be achieved with a single coat, multiple coats may be necessary if the material slumps due to temperature and/or substrate conditions. Allow each previous coat to dry (approximately one hour) prior to applying the next coat.
Film Thickness … Frequently inspect the surface with a wet film gauge to verify that proper film thickness is achieved, and that the film thickness is uniform over the entire surface. Porous substrates, masonry blocks, etc., may require multiple coats to achieve recommended film thickness.
Drying Times … Curing/drying times are
dependent on jobsite conditions, such as air
temperature, airflow, relative humidity, substrate
temperature, etc. Typical results are:
Tack-free time: 2 hours
Full cure: 48 hours
| COVERAGE Application Rate Wet Film Thickness Cured Film Thickness |
16-20 ft.²/gal. 90 mil (2.3 mm) 45 mil (1.15 mm) |
SPRAYING EQUIPMENT
AIR-SHIELD LMP is most effectively applied by
using the Graco HydraMax 350 or the Graco
GH833 Big Rig.
The Graco heavy duty texture gun is recommended for use with the following tips:
For best results, use the 0.051” (Graco GHD 551) heavy duty switch tip.
If cratering occurs and a smoother finish is desired, a 0.037” (Graco GHD 537) tip is recommended.
CLEANUP
Material should not be left in the pump, lines or
gun when finished spraying. After spraying, flush
water through the system until pump and hose are
clear (approximately five gallons). Aromatic
solvents, such as xylene or toluene
(approximately two gallons) can be used for final
flushing after water is flushed through the pump
and lines. Water should be flushed through the
machine to remove any solvent prior to spraying
of AIR-SHIELD LMP.
SHELF LIFE (TYPICAL)
Twelve (12) months in original, unopened
container. Store at 40° - 90° F.
PRECAUTIONS
DO NOT FREEZE. Keep containers tightly
sealed. Maximum UV exposure period for grey
membrane is six (6) months, unlimited for black.
Do not apply AIR-SHIELD LMP if rainfall is
forecast or imminent within 12 hours of
application. Do not apply AIR-SHIELD LMP
when temperatures are expected to fall below 32° F
(0° C) within 24 hours of the completed
application.
HEALTH AND SAFETY
Direct contact may result in mild irritation to the
skin and eyes. Should adverse effects occur,
remove subject from area immediately. If
irritation occurs and persists, move victim from
exposure source and treat symptomatically. Flush
affected areas with mild soap and water. Refer to
Material Safety Data Sheet for complete health
and safety information.
TECHNICAL ASSISTANCE
Please contact W. R. MEADOWS for specific
details and/or data not outlined in this literature.
Technical assistance, from design to product
application, is available upon request.
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This material last updated February 2009.
