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Product Information
Technical Datasheet
Safety Datasheet


Single component moisture expanding, rubber-based hydrophilic sealant. Provides a watertight joint around pipework, light fittings etc in swimming pools. Also for sealing cracks in concrete and waterproofing cold joints in reinforced concrete.


  • Sealing pipe-work which passes through concrete.
  • Sealing spacers in formwork.
  • Sealing cold joints in reinforced concrete structures.
  • Sealing where water seeps through cracks in reinforced concrete structures.
  • Bonding various types of joints.
  • Sealing lights and drainage outlets in swimming pools and tanks.
  • Sealing construction joints in concrete walls.


Mapeproof Swell has been specially developed to form flexible, waterproof seals in cracked reinforced concrete or in prefabricated elements with infiltration of water.