Sikagard® AWB 900
(formerly MSeal AWB 900)
LIQUID FLASHING MEMBRANE
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Sikagard® AWB 900 is a one-component elastomeric material for use as a flexible waterproofing flashing membrane for rough openings. It can also be used to prepare sheathing joints for subsequent application of Sika air/water-resistive barrier membranes.
- Can be applied to damp substrates
- Withstands rainfall immediately after application
- 180 days of UV exposure
- Fast cure and tack-free time
- Bonds to a wide range of substrates
- Does not contain solvents, phthalates, or isocyanates.
Usage
Sikagard® AWB 900 can be used as a membrane for flashing rough openings, and small penetrations and as a detailing compound for preparing sheathing joints for application of an air/ water-resistive barrier membrane. Acceptable substrates include poured concrete/ unit masonry, ASTM C1177 sheathings including DensGlassTM exterior sheathing, DensElementTM, eXPTM sheathing, GlasRoc sheathing, SecurockTM glass-mat sheathing, Weather DefenseTM Platinum sheathing, GreenGlass sheathing, PermaBaseTM cement-board by National Gypsum and other cement-boards (ASTM C1325 Type A Exterior) Exposure 1 or exterior plywood sheathing (grade C-D or better), Exposure 1 OSB, gypsum sheathing (ASTM C79 / ASTM C1396) pressure or fire retardant treated wood, steel and aluminum.Advantages
- Can be applied to damp substrates
- Withstands rainfall immediately after application
- 180 days of UV exposure
- Fast cure and tack-free time
- Bonds to a wide range of substrates
- Does not contain solvents, phthalates, or isocyanates.
Packaging
Sikagard® AWB 900
• 20 oz. propack
• 20 propacks per case
Color
Dark Grey
Product Details
APPROVALS / STANDARDS
AAMA 714-15 Voluntary Specification for Liquid Applied Flashing Used to Create a Water-Resistive Seal Around Exterior Openings in Buildings
AAMA 711-13 Voluntary Specification for Self-Adhering Flashing Used for Installation of Exterior Wall Fenestration Products
ICC-ES AC212 Acceptance Criteria for Water-Resistive Coatings Used as Water-Resistive Barriers over Exterior Sheathing, approved February 2015
Shelf Life
Sikagard® AWB 900 has a 1-year shelf life when properly stored.
Storage Conditions
Store in original, unopened containers in a cool, dry place away from sources of heat and direct sunlight at a minimum of 40 °F. In cold weather, keep containers at room temperature for at least 24 hours before using. Storage at elevated temperatures will reduce shelf life.
Solid content by volume
99%
Tensile Strength
| Pass, min 2.9 pli, at 12 and 30 mils | (AAMA 711 Sec 5.1, ASTM D5034) |
Tensile Bond
| Tested over ASTM C1177 sheathing, plywood, OSB, cement board, PVC, aluminum, galvanized steel, and stainless steel Pass, > 105 kPa (15 psi) | (AC 212 Sec 4.1, ASTM C297) |
Crack Bridging Ability
| Pass, no failure after 10 cycles with 1/8" gap and water holdout of 550 mm (21.7") for 24 hours, tested at 60 mils per ASTM C1305 instructions | (AAMA 714 Sec 5.6, ASTM C1305) |
Adhesion in peel
| Peel Adhesion | Tested over ASTM C1177 sheathing, plywood, OSB, concrete (mortar), CMU, galvanized steel, aluminum | (ASTM C794) |
| Control | Pass control and after conditioning, min. 5 pli | (AAMA 714 Sec 5.1) |
| UV exposure | (Sec 5.3, ASTM G154) | |
| Elevated temperature | (AAMA 714 Sec 5.4) | |
| Thermal cycling | (AAMA 714 Sec 5.5) | |
| 7-day water immersion | (AAMA 714 Sec 5.7) |
| Peel Adhesion | Tested over ASTM C1177 sheathing, plywood, OSB, PVC, galvanized steel, aluminum | (ASTM D3330 Method F) |
| Control | Pass control and after conditioning, min. 1.5 pli | (AAMA 711 Sec 5.3) |
| UV exposure | (Sec 5.4, ASTM G154) | |
| Elevated temperature | (AAMA 711 Sec 5.5) | |
| Thermal cycling | (AAMA 711 Sec 5.6) | |
| 7-day water immersion | (AAMA 711 Sec 5.8) |
| Peeling Resistance | Pass, no signs of peeling after 7 days exposure to elevated temperatures - 50 °C (122 °F), 65 °C (149 °F) and 80 °C (176 °F) |
Thermal resistance
Thermal Cycling
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage, or warpage after 10 cycles | (AAMA 714 Sec 5.5) |
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage, or warpage after 10 cycles | (AAMA 714 Sec 5.6) |
Low Temperature Bend
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage or warpage after 7 days | (AAMA 711 Sec 5.7, ASTM D1970 Sec 7.6) |
Thermal Resistance
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage, or warpage at 50 °C (122 °F), 65 °C (149 °F), and 80 °C (176 °F) | (AAMA 714 Sec 5.4) |
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage, or warpage at 50 °C (122 °F), 65 °C (149 °F), and 80 °C (176 °F) | (AAMA 714 Sec 5.5) |
Water Penetration under Pressure
| Pass, testing was performed with Sikagard® AWB 900 exposed over sheathing joints. No water penetration at 137 Pa (2.86 psf), 299 Pa (6.24 psf) or 575 Pa (12psf) | (AC212 Sec 4.5, ASTM E331) |
Sequential - Structural, Racking, Restrained Environmental and Water Penetration
| Pass, testing performed with Sikagard® AWB 900 exposed over sheathing joints | |
| Structural ASTM E1233 | No cracking at joint or interface of flashing |
| Racking ASTM E72 | No cracking at joint or interface of flashing |
| Restrained Environmental AC212 Sec 4.7.3 | No cracking at joint or interface of flashing |
| Water Penetration ASTM E331 | No water penetration at 137 Pa (2.86 psf), 299 Pa (6.24 psf) or 575 Pa (12psf) |
Nail Sealability
| Pass, before and after thermal cycling, 24 hours at 40 °F with 31.75 mm (1 ¼") head of water |
| Pass, before and after thermal cycling, 24 hours at 40 °F with 31.75 mm |
| Pass, before and after thermal cycling, 3 days at 40 °F with 127 mm (5") head of water | (ASTM D1970 Sec 7.9) |
Permeability to Water Vapor
| 19.9 perms at 12 mils |
| 7.2 perms @ 30 mils |
| 19.9 perms @ 12 mils 7.2 perms @ 30 mils |
Air permeance
| 0.00410 L/s-m2 at 75 Pa (0.00082 cfm/ft2 at 1.57 psf), performed on 12 mil thick free film sample | (ASTM E2178) |
| 0.00410 L/s-m2 at 75 Pa (0.00082 cfm/ft2 at 1.57 psf), performed on free film sample | (ASTM E2178) |
Water resistance
| Pass, 14-day exposure, no deleterious effects such as cracking, checking, crazing, or erosion | (AC212 Sec 4.3, ASTM D2247) |
Water Immersion
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage or warpage after 7 days | (AAMA 714 Sec 5.7) |
Adhesion to Damp Substrates
| Pass, min 5 pli, over OSB and mortar (absorptive substrates) | (AAMA 714 Sec 6.1 and 6.2) |
UV Exposure
| No cracking or bond failure after 210 hrs | (AC212 Sec 4.8.1) |
Resistance to Weathering
| Pass | (AC212 Sec 4.8) |
Freeze-Thaw Stability
| Pass, 10 cycles, no deleterious effects such as cracking, checking, crazing, or erosion, viewed at 5x magnification | (AC212 Sec 4.2) |
Artificial Ageing
| Pass, no deleterious effects such as wrinkling, distortion, blistering, expansion, shrinkage or warpage after 14 days (336 hours) to Cycle 1 of G154 | (ASTM E 96 Method A) |
| No cracking or bond failure after 25 cycles | (AC212 Sec 4.8.2) |
Application
SUBSTRATE PREPARATION
Apply to clean surfaces free of frost, debris, contamination, and materials that may inhibit bonding. Remove any standing water such that no water is visible or transferred to skin upon touching the surface. Test bonding performance on a small area before proceeding with the overall application.
APPLICATION
Flashing Rough Openings:
- Apply a bead of Sikagard® AWB 900 in each corner of the rough opening, ensuring that corners are fully sealed. Where wood bucks are used, apply a bead of Sikagard® AWB 900 into gaps between bucks and between the buck and building structure.
- 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. Extend Sikagard® AWB 900 membrane minimum of 4 inches onto the exterior wall, maintaining 12-20 mil thickness.
- Extend Sikagard® AWB 900 at a minimum of 4 inches onto the exterior wall, maintaining 12-20 mil thickness.
- Allow Sikagard® AWB 900 to skin before applying Sikagard® AWB fluid-applied air/water-resistive barrier to sheathing. Lap the air/water-resistive barrier a minimum of 2 inches onto Sikagard® AWB 900, creating a continuous, monolithic air/water-resistive barrier membrane.
- Allow Sikagard® AWB 900 to skin before the installation of windows, doors, and other wall assemblies.
Sheathing Joints:
- Apply a thick bead of Sikagard® AWB 900 to sheathing joints.
- Spread Sikagard® AWB 900 evenly a minimum of 1 inch beyond the joint on either side. Apply 20 mils of Sikagard® AWB 900 across the sheathing joint.
- Spot fastener heads with Sikagard® AWB 900 or Sikagard® AWB fluid-applied air/water-resistive barrier.
- Allow Sikagard® AWB 900 to skin before applying Sikagard® AWB fluid-applied air/water-resistive barrier to sheathing.
Inside and Outside Corners:
- At the inside and outside corners, apply a bead of Sikagard® AWB 900 vertically into the joint. Apply additional Sikagard® AWB 900 in a zigzag pattern onto the joint. Spread Sikagard® AWB 900 evenly a minimum of 1 inch beyond the joint on either side to form a uniform, continuous void, and pinhole-free membrane.
- Spot fastener heads with Sikagard® AWB 900 or Sikagard® AWB fluid-applied air/water-resistive barrier.
- Allow Sikagard® AWB 900 to skin before applying Sika fluid-applied air/water-resistive barrier to sheathing.
Penetrations through wall construction:
- Sikagard® AWB 900 can be used to seal penetrations up to 1/2 inch gap.
CURING TREATMENT
Sikagard® AWB 900 typically skins in 25 to 40 minutes and cures in 4 to 6 hours of application at 75 °F and 50% relative humidity. Warmer and more humid conditions will accelerate curing. Cure times will be extended in dry and cold conditions. Sikagard® AWB 900 can be applied to frost-free, dry substrates above 25 °F, but curing will not be initiated until temperature rises and remains above 32 °F.
CLEANING OF TOOLS
Immediately after use, clean equipment with Xylene or other appropriate solvent. Use proper precautions when handling solvents. Remove the cured membrane by cutting with a sharp-edged tool. Remove thin films by abrading.