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    Sika® Igolflex®-621 (formerly known as MasterSeal® 621) - High build bitumen / rubber latex emulsion

    How does MasterSeal 621 work?

    MasterSeal 621 is a brown rubber/bitumen liquid emulsion with excellent adhesion which dries to a tough black seamless, flexible damp-proof and vapour-proof membrane.

    What are MasterSeal 621 typical applications?

    • Tanking and damp-proofing structures: to provide an impervious damp-proof membrane on concrete and brick.
    • Floors: to provide a sandwich membrane in new construction or a surface treatment.
    • Walls: for interior and exterior walls.
    • Roofs: for the maintenance of many types of roofs including built-up felt, asphalt, lead, zinc, aluminium, concrete, lightweight screeds timber, slate, asbestos cement, corrugated iron, and as a vapour barrier.
    • As an adhesive: for bonding wood blocks and wood mosaics, insulation board, expanded polystyrene and cork tiles and to provide a key for plastering.​


    Job References - MasterSeal 621

    pdf (247.94 Kb)

    MasterSeal 621_MS

    pdf (108.28 Kb)

    MasterSeal 621_TDS

    pdf (271.40 Kb)


    Oman: +968/24435800
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