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    SikaSwell®-912 (formerly known as MasterSeal® 912) - Swelling gasket in paste form

    How does MasterSeal 912 work?

    MasterSeal 912 is a one component, moisture curing pre-polymer which is reswellable when in contact with water, suitable for the permanent sealing of construction joints in concrete structures

    What is MasterSeal 912 used for?

    • MasterSeal 912 swelling paste is supplied in ready to use cartridges. 
    • The substrate must be free of grease, dust and loose particles. Do not apply on frozen surfaces.
    • Hardening prior to concreting is min. 24 hours.
    • The swelling paste should be protected against premature swelling.
    • When concreting, take care to ensure that the expanding paste is fully covered by concrete. ​

    What are the benefits of MasterSeal 912?

    MasterSeal 912 offers the following benefits:

    • Simple to use.
    • High swelling capacity in contact with water.
    • Highly resistant to chemicals and saline liquids (see chemical resistance table).
    • Good adhesion to dry and moist surfaces (concrete, steel and plastics).
    • Reversible swelling process.


    MasterSeal 912_TDS

    pdf (265.94 Kb)


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