Foster® Vapor-Safe® Coating 30-80

• FOSTER® VAPOR-SAFE® COATING is a water-based, fire- resistive, flexible, high solids vapor retarder finish for most types of thermal insulation, including polystyrene foam.
• It may be used over dry concrete and finishing cement.
• VAPOR-SAFE® COATING has the low water vapor permeance normally found in only solvent-based products.
• It can be used in high humidity environments, and greatly retards water vapor permeation. It is non-flammable in the wet state.
• VAPOR-SAFE® COATING is formulated for both indoor and light duty, commercial, outdoor use. It is UV resistant.
• It has a mild, latex “paint-type” odor, and is designed for use over insulation on pipes, vessels, ducts and equipment operating at cryogenic up to ambient temperatures.
• VAPOR-SAFE® COATING is ideal for vapor sealing ASJ, FRK and FSK jackets and board facings at joints, laps and over staple and weld pin punctures.
• It is an excellent duct board closure sealant. Do not exceed 1/8” (3.2 mm) wet film thickness.
• VAPOR-SAFE® COATING meets the requirements of Military Specification MIL-PRF-19565C, Type II using method ASTME96, Procedure A permeance and is QPD-19565 Listed. VAPOR-SAFE® COATING contains no asbestos, lead, mercury or mercury compounds.
• VAPOR-SAFE® COATING 30-80 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

Preparation

• Stir well, Do not thin.
• Apply only to clean, dry, oil-free surfaces.
• Keep container closed when not in use.

Application

• To prevent water vapor and moisture infiltration, proper and complete flashing is required.
• Follow flashing specifications.
• Indoor and light duty outdoor

1. Apply tack coat of Foster® VAPOR-SAFE® Coating at 2 – 4 gallons per 100 square feet (0.8 – 1.6 l/m2 ).
2. 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-SAFE® Coating, within 1/2 hour of the tack coat application, at 2 gallons per 100 square feet (0.8 l/m2 ).
3. This application shall provide a minimum dry film thickness of 37 – 56 mils (0.9 – 1.4 mm).
4. Do not use with canvas or other closed weave cloth.

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

• VAPOR-SAFE® Coating may be airless spray applied.
• For spray equipment information, please consult Airless Spray Recommendations or contact your airless spray equipment supplier.
• Average viscosity range: 60,000 – 90,000 cps.
• Corrosion resistant pumps and fittings are suggested.

• Use fresh water for cleaning 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 (flammable).