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    MasterSeal 721PB - Self-adhesive membrane

    What is MasterSeal 721PB?

    MasterSeal 721PB is a special SBS- modified self-adhesive protection membrane incorporating a surface reinforcement of tough, heavy-duty spun bond non–woven polyester mat.

    MasterSeal 721PB is specially designed for use as protection sheet over other membrane in a wide variety of applications. The bottom surface is covered with siliconized release paper or foil.

    The MasterSeal range belongs to the group of membranes produced using a special grade of bitumen modified with virgin SBS polymer. The spun bond polyester is laminated on the selfadhesive compound with the bottom laminated with a release foil.

    What is MasterSeal 721PB used for?

    MasterSeal 721PB is designed for use as a protection sheet over waterproofing membranes where traditional protection boards
    prove difficult to install, such as:
    • Foundations
    • Manholes, pipes and the like
    • Tunnels, trenches and ducts
    • Any structure where shape conformity is important

    What are the benefits of MasterSeal 721PB?

    • Ease of application over existing membranes
    • Excellent bond to self-adhesive and torch on membranes with foil finish
    • High tear strength and puncture resistance
    • Conforms to difficult contours and shapes
    • High dimensional stability
    • Resistant to UV and to chemicals found in soil and ground water


    MasterSeal 721PB_TDS

    pdf (289.27 Kb)


    UAE: +971/48090800
    Oman: +968/24435800
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