Foster® Vapor-Safe® Coating AF 30-80AF™

• FOSTER® VAPOR-SAFE® COATING AF 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.
• It is designed for use in high humidity areas to resist mold, fungus and mildew growth on its surface and protect the insulation system from their discoloring and deteriorating effects.
• VAPOR-SAFE® 30-80AF™ has the water resistance and low water vapor permeance normally only found in 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® 30-80AF™ 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 below ambient temperatures.
• VAPOR-SAFE® 30-80AF™ 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® 30-80AF™ meets the requirements of Military Specification MIL-PRF-19565C, Type II using method AS™ E96, Procedure A permeance.
• VAPOR-SAFE® COATING 30-80AF™ 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

• Apply tack coat of Foster® VAPOR-SAFE® Coating AF at 2 – 4 gallons per 100 square feet (0.8 – 1.6 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-SAFE® Coating AF, 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 film thickness of 37 – 56 mils (0.9 – 1.4 mm).
• Do not use with canvas or other closed weave cloths.

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 AF 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).

• Store and apply between 40°F (4°C) and 100°F (38°C), protect from freezing until dry.
• To resist rain wash-off, allow at least 8-12 hours drying time above 50°F (10°C), with a relative humidity of 50%.
• Higher humidity and/or lower temperature may retard drying.
• Always select coating in the white color for use over polystyrene on outdoor installations.
• After long term exposure, 30-80AF™ may weather to an off-white color.
• Always test foil and paper facings 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.
• This product does not protect users or others against bacteria, viruses, germs or other disease organisms.
• It does not take the place of normal cleaning and disinfecting procedures.