Please login with your username and password.


Can’t remember your accounts password?

Can't access your account?

Select your language

This page is available in the following languages:

    Please select your location

    SikaSwell® A (AE) (formerly known as MasterSeal® 910) - Water swelling waterbar for joints

    How does MasterSeal 910 work?

    MasterSeal 910 Waterbar is suitable for all construction joints subject to hydrostatic pressure, on one or both sides. MasterSeal 910 provide simple but efficient waterproofing of construction joints. Movements in the joint, e.g. by shrinkage or settlement in the substrate, are taken up by the elastic profile of the MasterSeal 910 Waterbar. MasterSeal 910 has been successfully employed to waterproof joints where an opening of up to 5mm was deliberately created. Water pressure of up to 5 bar was sealed.

    MasterSeal 910 is based on a newly developed polymer technology providing flexible polymer composites which have high chemical resistance capable of storing water in their molecular structure by increasing their volume.

    Where previously MasterSeal 910 was available in different grades for various exposure conditions. A single version of MasterSeal 910 now resists deterioration in the following conditions: In fresh water and where the water has a high salt content (sea water, brackish water), in construction with high chemical exposure and/or exposure of solvents, including oils and fuels. MasterSeal 910 is a component of the Master Builders Solutions pile-cap waterproofing and watertight jointing systems. Consult your representative for details.

    What are the benefits of MasterSeal 910?

    When in contact with water the MasterSeal 910 Waterbars will slowly increase in volume (swell) without changing the homogeneous structure of the polymer matrix. The increase in volume by the swelling action can be up to 200% (depending on type of water). The pressure of the swelling action will cause the MasterSeal 910 Waterbar to profile itself exactly into the joint filling all cavities and effectively stopping water seepage, even at high external water pressure.

    The MasterSeal 910 Waterbars will not transport water through their polymer matrix and thus not act as a capillary duct. The swelling action is limited to the sides exposed to water.​


    JRef - MasterSeal 910

    pdf (629.38 Kb)

    MasterSeal 910_TDS

    pdf (256.31 Kb)


    UAE: +971/48090800
    Oman: +968/24435800
    More Locations & Distributors