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    MasterSeal AWB 661I - Air/Water-Resistive Barrier Membrane - Class 1 Vapor Retarder

    What is MasterSeal AWB 661I air barrier?

    MasterSeal AWB 661I is a one-componentliquid applied air/water-resistive barrier that can also function as a vapor retarder. It is based on Silica Fortified Rubber™ chemistry. It is chemically identical to, and performs the same function as, Enershield I, which is replaces. This waterproof, resilient membrane may be spray-, roller-, or brush-applied directly to approved above grade wall substrates. It provides excellent secondary moisture protection behind most wall claddings including brick, siding, metal panels, and EIFS.

    Where can MasterSeal AWB 661I be applied?

    As a very low permeability, air, vapor and water barrier for high rise and low rise residential, commercial, institutional buildings or  as an integral part of building designs to reduce heating and cooling costs during the life of the building.
    For use over the following above ground,
    exterior wall substrates:
    • In-situ concrete
    • Precast concrete
    • Cement board
    • Concrete blocks
      • Aerated
      • Hollow
      • Solid​


    Job References - MasterSeal AWB 661I

    pdf (85.57 Kb)

    MasterSeal AWB 661I Application on Concrete or Block Work_MS

    pdf (109.69 Kb)

    MasterSeal AWB 661I Application on Framing and Sheathing Boards_MS

    pdf (110.80 Kb)

    MasterSeal AWB 661I_TDS

    pdf (226.55 Kb)


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