Foster is trusted industry wide for mastics, membranes, sealants, coatings, and adhesives. While these products can sometimes be overlooked as a small piece of any project, it is crucial that they stand up to the demands placed on them. It is equally important that you have no doubt they will perform as expected.

In many cases, these products may be the system’s last line of defense in protecting it from any number of risks.

Vapor Barrier Membrane



• Aluminum laminate with black butyl adhesive
• 12µ polyester / 25µ aluminum / 12µ polyester laminate facing
• Film Thickness: 1.2 mm nominal (47 mils)
• Water vapor permeance 0.00 perms (ASTM E-96 Procedure E)


Vapor Stop Sealant



• Easier & faster one-component application
• Improved application consistency
• Higher flash point = 115°F (46°C)
• Saves time, saves money!


Vapor Barrier Joint Sealant



• One component, butyl rubber based product
• Remains soft and flexible, preventing damage to the insulation due to thermal cycling through a wide range of temperatures
• Special “buttery” consistency, with no stringing or excessive drag on application

• Apply at temperatures as low as 50°F (10°C) without difficulty