Enhanced TDS
Identification & Functionality
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Product Highlights
- FOSTER® VAPOR-FAS™ WB COATING is an economical, fire- resistive, vapor retarder coating for use over many types of thermal insulation including polystyrene foam.
- It is ideal for use over ASJ, FRK and FSK jackets and board facings to give a vapor retarder seal at joints, laps and weld pin punctures.
- VAPOR-FAS™ WB COATING is formulated for indoor and outdoor commercial use. It has a mild, latex "paint-type" odor and is designed for use on insulated pipes, vessels, ducts and equipment operating between 32°F (0°C) and ambient temperatures.
- VAPOR-FAS™ WB COATING has a low WVTR rating effectively sealing against water ingress.
- VAPOR-FAS™ WB COATING meets NFPA 90A and 90B 25/50 requirements when used to seal seams and punctures in vapor retarder facings and jacketing.
- VAPOR-FAS™ WB COATING meets the requirements of:
- MAS Certified Green®
- California Dept. of Public Health Standard Method v1.2
- VOC Emissions and Content requirements to contribute to LEED v4 EQ Credit: Low Emitting Materials – Paints and Coatings
- Collaborative for High Performance Schools EQ 7.1
Applications & Uses
- Markets
- Application Method
- Compatible Substrates & Surfaces
- Preparation and Application Information
Preparation
- Stir well, Do not thin.
- Apply only to clean, dry, oil-free surfaces. Keep container closed when not in use.
Application – indoor and light duty outdoor
- To prevent water vapor and moisture infiltration, proper and complete flashing is required.
- Follow flashing specifications.
- To seal seams, overlaps, punctures, penetrations and terminations of vapor retarder membrane jacketing:
- Apply tack coat of Foster® VAPOR-FAS™ WB Coating at 2 gallons per 100 square feet (0.8 l/m2 ).
- Embed Foster® MAST-A-FAB® White Membrane into the wet tack coat. Smooth membrane to avoid wrinkles and overlap all seams at least two inches (5 cm). Apply finish coat of VAPOR-FAS® WB Coating, within 1/2 hour of the tack coat application, at 2 gallons per 100 square feet (0.8 l/m2 ).
- This application shall provide a minimum dry thickness of 31 mils (0.8 mm).
Brush
- Use a good brush, suitable for water-based paints, making strokes as long as possible over the surface.
- Apply with full brush and spread out evenly.
- Do not overwork.
Spray
- Foster® VAPOR-FAS® WB Coating may be airless spray applied.
- For spray equipment information, please consult Airless Spray Recommendations or contact your spray equipment supplier.
- Average viscosity range: 85,000 – 110,000 cps.
- Corrosion resistant pumps and fittings are suggested.
- Cleaning Information
- Use fresh water to clean brushes and equipment before product dries. '
- Dry product may be removed with hot soapy water (with ammonia added) or strong solvents such as chlorinated solvent (non-flammable) or xylol or mineral spirits (flammable).
Properties
- Color
- Physical Form
- Typical Properties
- Application Properties
- Flame Characteristics
| Value | Units | Test Method / Conditions | |
| Average Weight / U.S. Gallon | 1.38 | kg/l | ASTM D1475 |
| Average Non-Volatile (by Volume) | 59.0 | % | ASTM D2369 |
| Average Non-Volatile (by Weight) | 71.0 | % | ASTM D2369 |
| Coverage Range | 4 - 6 | gal./100 sq. ft | - |
| Drying Time (Set to Touch) | 4.0 | Hours | - |
| Drying Time (Dry Through) | 24.0 | Hours | - |
| Water Vapor Permeance | 0.03 | Perms | ASTM E96, PROCEDURE A |
| Water Vapor Permeance | 0.05 | Perms | ASTM E96, PROCEDURE A |
| Water Vapor Permeance | 0.08 | Perms | ASTM F1249 |
| Wet Flammability | 100.0 | °C | - |
| Value | Units | Test Method / Conditions | |
| Service Temperature Range | -29 to 82 | °C | - |
| Value | Units | Test Method / Conditions | |
| Surface Flame Spread | 15.0 | - | ASTM E84 |
| Smoke Developed | 30.0 | - | ASTM E84 |
Regulatory & Compliance
- Certifications & Compliance
- Chemical Inventories
Storage & Handling
- Shelf Life
- 12 months
- Handling Conditions
- Store and apply between 40°F (4°C) and 100°F (38°C), protect from freezing until dry.
- Always test foil and paper facings and plastic surfaces for acceptable adhesion before using.
- Outdoor horizontal surfaces must always drain completely. A pitch of at least 1/2" per foot (4 cm/m) is required.
- To resist rain wash-off, allow at least 16 hours drying time above 50°F (10°C), with a relative humidity of 50%.
- Higher humidity and/or lower temperature may retard drying.