Waterblocking tapes

Waterblocking tapes

Water-blocking nonwoven tapes or swellable tapes are specialized materials that swell upon contact with water, forming a physical barrier to prevent the ingress or spread of moisture. This makes them critical in applications where protection against water is essential for maintaining performance, safety, and durability.

Typical Application Areas

  • Cable Industry: These tapes (non-conductive or semi-conductive) are widely used in power and communication cables for longitudinal and radial water blocking. They prevent moisture from penetrating the cable core, thereby protecting electrical performance and extending cable life.

  • Electrical Insulation: In transformers, coils, and other electrical equipment, swellable tapes help maintain insulation integrity in case of moisture exposure, reducing the risk of electrical failure.

  • Packaging Industry: In moisture-sensitive packaging applications—such as for electronics or pharmaceuticals—water-blocking layers act as protective barriers, ensuring product stability during transport and storage.

  • Electrical Engineering: In connectors, junction boxes, and outdoor enclosures, water-blocking tapes add an extra layer of protection against humidity, condensation, and water ingress, enhancing overall system reliability.

Single LayerTwo LayersMulti Layers
WB-TapeWB-Tape/PETAL/PET/WB-Coating
SC-WB-Tape  
  • Wasserblockierende Bänder