Product Data Sheet Safety Data Sheet Show all documents

Sikagard® AWB 665

(formerly MSeal AWB 665)

VAPOR PERMEABLE AIR/WATER-RESISTIVE BARRIER

Sikagard® AWB 665 is a one-component, fluid-applied vapor permeable air/water-resistive barrier. This waterproof, resilient coating may be spray-, roller-, or brush-applied directly to approved above grade wall substrates. It provides excellent secondary moisture protection behind most wall claddings including brick, siding and metal panels.

  • ICC ESR-3209 Evaluation Report
  • <1% of allowable air leakage per ASTM E2357 Air Leakage of Building Assemblies Test
  • Meets ASTM D1970 nail sealability requirements with and without Sheathing Fabric
  • Water-based, one-component, low-VOC formulation
  • Nonflammable as applied. Class A Fire Rated (ASTM E84)
  • Mineral oil and plasticizer free
  • 180 Day UV Exposure
  • 99% Drainage Efficiency per ASTM E 2273
  • Meets NFPA 285 requirements when part of a tested assembly
Product Data Sheet Safety Data Sheet Show all documents

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

  • ICC-IBC, ICC-IRC, ICC-IECC, and ABAA-compliant material
  • ICC-ES AC 212: Acceptance Criteria for Water-Resistive Coatings used as Water-Resistive Barriers over Exterior Sheathing
  • ICC-ES AC 148: Acceptance Criteria for Flexible Flashing Materials
Product Information

Chemical Base

Sikagard® AWB 665 is based on Silica Fortified Rubber™ chemistry.

Shelf Life

Sikagard® AWB 665 has 2 years shelf life when properly stored

Storage Conditions

Store in unopened containers in a clean, dry place to protect liquid system components from freezing. Store at no less than 4 °C (40 °F) and below 49 °C (120 °F). Protect from extreme heat and direct sunlight. Do not stack pallets.

Solid content by mass

73%
Technical Information

Abrasion Resistance

Pull-Off Strength of Coatings

Pass - Min. 110 kPa (15.9 psi) or substrate failure (Tested over exterior
gypsum sheathing, ASTM C1177 glass-mat sheathing, cement board, OSB, plywood; PVC and galvanized flashing)

(ASTM D 4541)

Tensile Strength

Tensile Strength after UV Exposure

All samples meet the minimum requirement of 3.5N/mm (20 lbs/in)

(ASTM D 5034, AAMA 711)

Tensile Bond

>103 kPa (15 psi) Tested over exterior gypsum sheathing, ASTM C1177 glassmat ASTM C1177 glass sheathing, cement board, OSB, plywood, CMU; pvc and galvanized flashing

(ASTM C 297)

(before & after freeze-thaw): >103 kPa (15 psi) avg; no failure of the lamina after 10 cycles freeze-thaw (Tested over various substrates)

(ASTM C 297)

External Fire Performance

Radiant Heat Multi-Story Tests

Passed using numerous wall assemblies. Engineering analyses are available upon request.

(NFPA 268, NFPA 285)

Resistance to fire

Will not add or detract from the rating of a fire resistive wall assembly

(ASTM E 119/UL 263)

Thermal Resistance

Compound Stability(Elevated Temperature)

No flowing, dripping, or drop formation up to 177 °C (350 °F)

(ASTM D 5147 Section 15)

UV Exposure

No cracking or bond failure to substrate

(ICC-ES AC 212)

No cracking or bond failure to substrate

(ICC-ES AC 148)

Artificial Ageing

No cracking or bond failure to substrate

(ICC-ES AC 212)

No cracking or bond failure to substrate

(ICC-ES AC 148)

Behavior after Artificial Weathering

Structural: No cracking at joints or interface of flashing

(ASTM E 1233 Procedure A)

Racking: No cracking at joints or interface of flashing

(ASTM E 72)

Restrained Environmental Conditioning: No cracking at joints or interface of flashing

(ICC-ES AC 212)

Permeability to Water Vapor

18 Perms (grains/Hr. in Hg. ft2) at 12 mils wet film thickness
14 Perms (grains/Hr. in Hg. ft2) at 20 mils wet film thickness

Water Penetration under Pressure

No water penetration after 90 min at 299 Pa (6.24 psf) Tested over OSB and gypsum sheathing

(ASTM E 331)

Hydrostatic Pressure Test: No water penetration at 55 cm (21.7”) water column for 5 hours

(AATCC 127-1985)

Nail Sealability(without Sheathing Fabric)

Pass - No water penetration at galvanized roofing nail penetration under 127 mm
(5”) head of water after 3 days at 4 °C (40 °F)

(ASTM D 1970)

Nail Sealability after Thermal Cycling

Pass

(ASTM D 1970 (Modified),AAMA 711)

Adhesion in peel

Tested over ASTM C1177 glass-mat sheathing, OSB, plywood, PVC and
uncoated aluminum
After UV exposure: Pass
After Accelerated Aging: Pass
After Elevated Temperature Exposure: Pass
After Water Immersion: Pass
Resistance to Peeling: No signs of distress or failure after 24 hours of exposure at room temperature, 50 °C (122 °F), 65 °C (149 °F), 80 °C (176 °F)

(AAMA 711)

Freeze-Thaw Stability

No sign of deleterious effects after 10 cycles (Tested over exterior gypsum sheathing, ASTM C1177 glass-mat sheathing, cement board, OSB, plywood)

(ASTM E 2485 (Method B))

Water resistance

No sign of deleterious effects after 14-day exposure (Tested over exterior gypsum sheathing, ASTM C1177 glass-mat sheathing, cement board, OSB, plywood)

(ASTM D 2247)

Hydrostatic Pressure: No water penetration at 55cm (21.7”) water column for 5 hours

(AATCC 127-1985)

Water retention

Drainage Efficiency

99%

(ASTM E 2273)

Low Temperature Bend

No cracking after bending around a 25 mm (1”) mandrel after
2-hour exposure to -18 °C (0 °F)

(ASTM D 1970, AAMA 711)

Air permeance

0049 l/s.m2 at 75 Pa (0.00098 cfm/ft2 at 1.57 psf)

(ASTM E 2178)

Application

Application Information

Drying Time

Allow to dry completely, typically 2 to 10 hours, before proceeding with cladding installation. Protect from rain and from temperatures less than 4 °C (40 °F) for 24 hours.
Consumption

Coverage

Substrate
ASTM C1177 Type Sheathing: 525 ft2 (48 m2) per pail
Cement Board: 575 ft2 (53 m2) per pail
Plywood*: 295 ft2 (27 m2) per pail
Oriented Strand Board (OSB): 295 ft2 (27 m2) per pail
Concrete Masonry Units (CMU)*:

  • Standard Weight 265 ft2 (24 m2) per pail
  • Medium Weight 180 ft2 (17 m2) per pail
  • Light Weight 125 ft2 (12 m2) per pail

Poured Concrete*:575 ft2 (46m2) per pail


* Roll or spray/backroll for optimum coverage rate. Other application methods may provide less coverage. Actual results may vary depending on surface porosity, roughness, moisture uptake, or other factors.
Concrete/Masonry with Sika Thorocoat®-749 Block Filler: 500 ft2 (46 m2) per pail
Application steps

EQUIPMENT

Airless spray equipment capable of spraying a minimum of 1 gallon per minute with a minimum size reversible tip of 0.019 is required. Airless equipment capable of greater deliveries can use larger tips. Tip sizes of 0.021 to 0.025 are recommended. Tip sizes greater than 0.025 provide too much material and affect the overall consumption of the material affecting the coverage rates. If pump filters are used, the minimum size of filter recommended is a 60 mesh filter. When spraying over Plywood and OSB, back rolling is recommended to completely encapsulate and create a pinhole-free application. For roller application, use a 13 mm (½") nap roller.

SUBSTRATE PREPARATION

Substrates shall be dry, clean, sound, and free of dust, release agents, paint, or other residue or coatings. Verify substrate is, free of fins or planar irregularities greater than 6.4 mm in 3 m (¼" in 10').
Unsatisfactory conditions shall be reported to the general contractor and corrected before application of Sikagard® AWB 665.

Walls should be capped to prevent moisture and precipitation from entering the wall during construction. Limit UV and weather exposure of Sikagard® AWB 665 to a maximum of 180 days.

MIXING

  1. Use directly from original packaging or prepare in a container that is clean and free of foreign substances. Do not use a container that has contained or been cleaned with a petroleum-based product.
  2. Mix Sikagard® AWB 665 with a clean, rust-free paddle and drill until thoroughly blended. Dilution of Sikagard® AWB 665 is not recommended.
  3. Additives are not permitted.
  4. Close the container when not in use.
  5. Clean tools and equipment with water immediately after use. Dried material can only be removed mechanically.

APPLICATION

USING Sikagard® AWB 900

Flashing Rough Openings:

  1. Apply a bead of Sikagard® AWB 900 in each corner of the rough opening and tool Sikagard® AWB 900 into corners, ensuring that corners are fully sealed. Where wood bucks are used, tool Sikagard® AWB 900 into gaps between bucks and between the building structure.
  2. Apply additional Sikagard® AWB 900 in a zigzag pattern onto the head, sill, jambs, and exterior substrate. Spread Sikagard® AWB 900 evenly across the rough opening to form a uniform, continuous, void- and pinhole-free membrane with a 12-20 mil thickness. Spread Sikagard® AWB 900 before it skins, typically within 2-3 minutes of application.
  3. Extend Sikagard® AWB 900 membrane minimum of 4 inches onto the exterior wall, maintaining 12-30 mil thickness.
  4. Allow Sikagard® AWB 900 to skin before applying Sikagard® AWB 665 to the sheathing. Lap air/water-resistive barrier a minimum of 2 inches onto Sikagard® AWB 900, creating a continuous, monolithic air/water-resistive barrier.
  5. Allow Sikagard® AWB 900 to cure before installing windows.

Sheathing Joints:

Sikagard® AWB 900 can be used to fill sheathing joints up to ½" wide.

  1. Apply a thick bead of Sikagard® AWB 900 to sheathing joints.
  2. Spread Sikagard® AWB 900 evenly 1-inch beyond the joint on either side. Apply 20 mils of Sikagard® AWB 900 across the sheathing joint.
  3. Spot fastener heads with Sikagard® AWB 900 or Sikagard® AWB 665.
  4. Allow Sikagard® AWB 900 to skin before applying a subsequent coat of air/water-resistive barrier.
  5. See the Sikagard® AWB 900 product bulletin for coverages and additional product highlights.

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