# FL80 metallised polyester netting

> Compact metallised polyester netting declared at 80 dB single layer and 106 dB two layers at 1 GHz, the manufacturer's standard bonded lining for walls, ceilings and floors.

- Canonical URL: https://emfbase.com/materials/woremor-fl80
- Collection: Shielding products
- Record id: `materials:woremor-fl80`
- Status: verified
- Last verified: 2026-08-12
- JSON: https://emfbase.com/api/materials/woremor-fl80
- Also known as: FL80

## Key values

- **Manufacturer:** WOREMOR
- **Model:** FL80
- **Material class:** Metal mesh and expanded-metal screen
- **Fields addressed:** radiofrequency, elf electric
- **Grounding required:** Yes — ungrounded installation can make things worse
- **Thickness:** 0.07 mm

## 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** — 80 dB — removes 100.000% of the incident power density (1 part in 1 × 10^8 gets through)
- **1 GHz, two layers** — 106 dB — removes 100.000% of the incident power density (1 part in 3.98 × 10^10 gets through)

## Test method

Manufacturer-declared at 1 GHz, measured to ASTM D4935-10 or IEEE Std 299-2006, with a screening report per material.

## Construction

Compact woven metallised polyester with copper, nickel and a protective coating, 80 g/m², 66 or 130 cm wide, tensile strength 220 N/mm.

## Typical application

- Bonded lining on interior walls, ceilings and floors
- Intermediate layer in drywall
- Loose-laid under floor coverings

## What the figure does not cover

- The declared 80 dB is a flat-sample figure; overlaps have to be conductively joined or each seam becomes the dominant leak
- Needs a level substrate for crease-free bonding, and structured surfaces must be smoothed or shielding paint used instead
- Metallised coatings degrade with abrasion, moisture and corrosion, and the loss cannot be seen
- Conductive: it must be grounded correctly to control low-frequency electric fields and to be safe near wiring

## 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

[EMR Shielding Solutions](https://www.emrss.com/products/fl80-hf-lf-shielding-netting) (rel: nofollow noopener)

EMR Shielding Solutions is a related company of WebKMS, which publishes EMFBase, and sells this product. The link is a stockist listing only: every figure on this page comes from the manufacturer's own documentation, and no specification, limitation or citation depends on it.

## Related records

- [Metal mesh and expanded-metal screen](https://emfbase.com/shielding/mesh): 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 attenuation](https://emfbase.com/quantities/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%.

## Sources

- `woremor-fl80` WOREMOR. *FL80 metallised polyester netting — technical data*. https://www.woremor.com/products/fl80-hf-lf-shielding-netting — manufacturer, link checked 2026-08-12

Data licence: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Dataset version 2026.08.1. Retrieved from EMFBase, https://emfbase.com.

This record is reference data, not medical or legal advice. Regulatory limits, scientific guidelines and precautionary values are labelled separately and answer different questions.