Foster 30-86 Vapor-Safe Coating | GLT Products

Foster 30-86 Vapor-Safe Coating

Foster® 30-86™ Vapor-Safe® Coating is a water-based, fire resistive, flexible, high solids vapor barrier finish for most types of thermal insulation, including polystyrene foam. It may be used over dry concrete, finishing cement, and most metals.


  • Water resistance and low water vapor permeance normally found in only solvent based products. 
  • Can be used in high humidity environments, and greatly retards water vapor permeation. 
  • Non-flammable in the wet state.
  • Formulated for both indoor and light duty commercial outdoor use. 
  • U.V. resistant. It has a mild latex “paint type” odor
  • Designed for use over insulation on pipes, vessels, ducts, and equipment operating below ambient temperatures.
  • Ideal for vapor sealing ASJ, FRK, and FSK jackets and board facings at joints, laps and over staple and weld pin punctures. 
  • Excellent duct board closure sealant. 
  • Do not exceed 1/8” (3.2mm) wet film thickness.
  • Meets the requirements of Military Specification MIL-C-19565C, Type II.
  • Conforms with current requirements regarding use in meat and poultry processing areas under federal inspection. Letter of certification is available upon request.
  • Meets requirements for LEED IEQ 4.2 Low-Emitting Materials, Paints and Coatings. VOC: 18 g/l, less water and exempt solvents.
  • No asbestos, lead, mercury, or mercury compounds.

For the most up-to-date SDS sheet, visit the manufacturer’s website: Foster Products

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