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HydroTank 306 Swell Mastic

  1. Fast-Curing, Swellable Protection: HydroTank 306 Swell Mastic is a single-component polymeric adhesive sealant that rapidly swells upon contact with water, expanding up to 200% of its original size for effective, fast-acting waterproofing.
  2. Multi-Purpose Application: This versatile sealant serves various purposes, including detailing for HydroBond 403 Plus, as a swelling adhesive for Newton System 300 hydrophilic waterbars, and for sealing service protrusions and pipes with Newton 307 PipeSeal, ensuring comprehensive waterproofing solutions.
  3. Reliable Water Tightness: Ideal for critical waterproofing needs, HydroTank 306 Swell Mastic provides reliable protection against water ingress, enhancing the integrity of structures and ensuring lasting water tightness in diverse applications.

Fast-curing, swellable, single-component, polymeric adhesive sealant. The special composition of HydroTank 306 Swell Mastic makes the sealant swell when in contact with water (to about 200% of original size).

  • Key Benefits
  • Typical Applications
  • Technical Data
  • Key Benefits

    Key Benefits

    • Very high resistance to water pressure.
    • Delayed swelling – will not swell during the installation process or during the concrete cure.
    • Swells up to 200% of its original size to quickly seal leaks at joints in the structure.
    • Very resistant to the high alkalinity of concrete.
    • Maintains very high elasticity and tensile strength, even when swollen.
    • Age resistant, no embrittlement.

    Typical Applications

    Typical Applications

    Technical Data

    Technical Data

     Cured performance  Result
    Tensile strength 5.8 MPa
    Elasticity  Up to 11 x initial size
    Swelling capability Up to 3.5 times initial size
    Watertightness  1 bar
    Installation temperature  5ºC to 40ºC
    Service temperature  -40ºC to 100ºC

    Speak to our friendly, expert team

    Our staff are able to provide guidance for projects of all sizes, whether you require some general advice about damp or waterproofing, or support with technical drawings and specifications.


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