WOREMOR WM-HG03 stainless steel gauze

Declared attenuation

Each figure is the manufacturer's declaration for the frequency and the layer or coat count named next to it. The percentage is computed from the dB value, not quoted separately.

1 GHz, single layer, flat sample

55 dB — removes 100.000% of the incident power density (1 part in 316,228 gets through)

Test method

Manufacturer-declared at 1 GHz, measured to ASTM D4935-10 or IEEE Std 299-2006; WOREMOR publishes a screening report for the material. Fire classification A1 to DIN 4102:1994.

Construction

Woven V4A stainless steel, 0.3 mm mesh width, 0.08 mm wire, 54% open area, 200 g/m², 90 cm wide.

Typical application

• Drywall construction
• Roof areas and under plaster
• Loose-laid under floor coverings
• Insect screens

What the figure does not cover

• Mesh attenuation falls as wavelength approaches the aperture size, so the 1 GHz figure does not carry to mmWave frequencies
• Elements must overlap by at least 5 cm and be bonded together; an unbonded overlap behaves as a slot and leaks
• Grounding is required to shield low-frequency electric fields, and the gauze is highly conductive, so it must be bonded correctly to avoid becoming a hazard near wiring
• The declared figure is for a flat sample: the installed result is set by the least-shielded path, usually a window or a penetration

What these figures are

Every attenuation value on this page is the manufacturer's own declaration for a flat sample in a test fixture, reproduced so that products can be compared on the same terms. It is not a regulatory limit, not an independent test, and not a prediction of what a meter will read after installation — an installed shield is set by its weakest path, so the only figure that describes a room is a before-and-after measurement of that room.

Where to buy

Related records

• Metal mesh and expanded-metal screen

  Woven or expanded metal used in wall build-ups, vents and window screens; attenuation depends on aperture size relative to wavelength, so a mesh that works at 900 MHz can leak badly at 5 GHz.

  Shielding & remediation

• Shielding attenuation

  Decibels of field reduction provided by a material. Every 10 dB is a factor of 10 in power density: 30 dB removes 99.9%, 10 dB removes 90%.

  Quantities & units

• Shielding verification

  How to prove a shielding measure worked: identical instrument, position and source conditions before and after, reported in dB as well as in absolute units.

  Measurement protocols

Sources

1. woremor-wm-hg03 WOREMOR WM-HG03 stainless steel gauze — technical data — WOREMOR. manufacturer, link checked 2026-08-12.