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Steel Twin - HF and LF Shielding Fabric Zoom

Steel Twin - HF and LF Shielding Fabric



£ 32.22
- +

This product is not sold individually. You must select at least 2 quantity for this product.

Steel Twin is a compact Cotton/Stainless Steel fabric for the protection against high frequency (HF) and low frequency (LF) radiation. Typical application as curtain.

Width: 150 cm

Length: 1 linear meter

Special feature: The frontside is made of white cotton, while the backside is densely woven with a stainless steel thread. Despite the high attenuation due to the gray stainless steel threads on the backside, this fabric has a light gray front side!


  • Good screening attenuation, even at high frequencies!

  • Excellent cost/performance ratio

  • Contactable (groundable) to shield LF electric fields

  • Textile characteristics: Washable, easy to iron and process

  • Quality grade: Very high


Technical data

  • Width: 150 cm, +/- 2 cm

  • Length: Available by the meter

  • Attenuation: 35 dB at 1 GHz

  • Color: Frontside light gray, backside silver

  • Raw materials: 68 % cotton, 16 % polyester, 16 % stainless steel

  • Weight: 190 g/m²

  • Dimension stability: +/- 3 %

  • Surface conductivity: 100-800 ohm / inch (2.54 cm)



Due to the surface conductivity this fabric can be grounded to shield low frequency (LF) electric fields. For professional earthing we recommend our Grounding-Plug EST.


Shielding attenuation

The shielding attenuation is regularly tested in our own laboratory or by Professor Dipl.Ing. Pauli at the University of the German Federal Armed Forces in Munich due to the standards ASTM D4935-10 and/or IEEE-STD-299-2006. The line in the diagram stands for the radial direction of polarisation (both directions, horizontal/vertical) and indicates the attenuation achievable in practice. You find the test report above.

EMF Shielding Fabric Steel Twin Graph



Cleaning in a washing machine at 30°C with our special washing detergent. No handwashing! Use only Leblok washing powder. (Other detergents MAY have a severe effect on shielding level)

For allergic persons: Every new fabric smells! Always wash before its first usage!


About the fabrics quality

This fabric is woven with a high content of silver- or stainless steel threads. Naturally, we only sell top quality fabrics processed for us in five different weaving mills, each one of them certified according to established norms. However, we cannot guarantee that there are absolutely no defects. We always cut out any visible defects from yard goods and curtains! Tiny defects, such as small flaws in weaving are no reason for complaint. The background to this are the usual high production costs in the textile industry which do not allow us as well as weaving mills to discard large amounts of production batches. We appreciate your understanding.


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