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Semi-Conductive Double-Layer Water Blocking Tape

Semi-Conductive Double-Layer Water Blocking Tape

These Tapes are laminated by polyester non-woven fabric layer and super swelling water absorbent powder together with semi conductive carbon black. Due to the high swelling speed and excellent swelling height, it can easily block water and moisture between the components and protect your power cable.


  • Polyester Non-woven Fabric
  • Polypropylene Super Absorbent Powder
  • Semi-conductive Carbon Black
  • Polyester Non-woven Fabric

 Technical Characteristics Table:

Specification Unit SWBT-C30 SWBT-C35 SWBT-C40 SWBT-C50 Test Method
Thickness mm 0.30±0.03 0.35±0.03 0.40±0.03 0.50±0.03  ISO 9073/2
Mass per unit weight g/m² 110±10 120±10 130±10 160±10  ISO 9073/1
Tensile Strength N/cm ≥30 ≥35 ≥40 ≥50  ISO 9073/3
Elongation % ≥12 ≥12 ≥12 ≥12  ISO 9073/3
Swelling Speed mm/1min ≥8 ≥9 ≥10 ≥12  Star Material Method
Swelling Height mm/3min ≥12 ≥13 ≥14 ≥16 Star Material Method 
Short Term Stability °C 230 Star Material Method 
Long Term Stability °C 90 IEC 216
Surface Resistivity Ω ≤1500 GB 3048
Volume Resistivity Ω•cm ≤1×106 GB 3048
Moisture Content % ≤9 ISO 287

Specifications can be customized according to customer requirements

Packaging and Marking:
The product will be packed in paper carton and fixed with Vacuum PE film inside. It is then sealed and packed on a wooden pallet. After it is fixed, an external plastic coversheet is wrapped around it to avoid water penetration.

Storage Information:
The product has a shelf life of 12 months from production date if stored in unopened original packages, under dry and clean conditions at temperatures between 10-30°C. The product will be damaged if stored in a moist area or contacted with water.


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