Rustins G-Shield | Electro-Smog Shielding Paint | EMF & 5G Signal Blocking Coating

• Shield a bedroom, living area or home office from high-frequency EMF and 5G signals
• Protect a commercial office, server room or sensitive equipment room from electromagnetic interference
• Create a shielded storage area or room to block relay attacks on keyless car entry fobs and protect RFID cards, passports and contactless devices from unauthorised scanning
• Apply a shielding coating that can be overcoated with standard emulsion paint for a normal decorative finish
• Use a water-based, low-emission shielding paint that can be applied in occupied buildings
• Achieve independently verified shielding performance tested by NPL
• Shield walls, ceilings or floors from both high-frequency and low-frequency electrical fields

• The surface has not been properly prepared — surfaces must be clean and free from grease and wax; remove flaking paint and rust before applying
• The temperature is below 10°C or humidity is high during application — do not apply in these conditions
• You require a coloured finish without overcoating — G-Shield is black and must be overcoated with emulsion for a decorative finish
• You require shielding for a very large area without grounding — for large areas, grounding with self-adhesive copper strips is recommended

Rustins G-Shield is a specialist water-based, solvent-free electro-smog shielding paint formulated to provide reliable protection from high-frequency electromagnetic fields (EMF) and low-frequency electrical fields. Based on a high-quality cross-linking acrylic resin containing natural exfoliated graphite, it provides incremental shielding attenuation of up to -57 dB per coat for the frequency range up to 20 GHz and higher — including the full 5G frequency spectrum.

The effectiveness of G-Shield has been independently tested at NPL — the National Physical Laboratory and the UK's national measurement standards laboratory — giving buyers confidence in the product's performance claims. Unlike metal-particle-based shielding paints, the carbon-based graphite formula contains no metal particles, which means it will not corrode on metal surfaces and has lasting corrosion resistance.

G-Shield is solvent-free with low emissions, making it suitable for application in occupied buildings during working hours. It can be overcoated with all commonly used emulsion paints and applied under clean organic plasters, allowing it to be concealed within a standard decorative finish. Floor coverings can be laid directly on the shielding coating. For large area applications, grounding with self-adhesive copper strips up to 1 inch wide is recommended to maximise shielding performance.

Key Benefits

• Up to -57 dB attenuation per coat — independently tested shielding performance across frequencies up to 20 GHz and higher including 5G
• NPL tested — verified by the UK's national measurement standards laboratory
• RFID and key fob signal blocking — create a shielded room or storage area to block relay attacks on keyless car entry systems and protect RFID cards and devices
• No metal particles — graphite/carbon formula prevents corrosion on metal surfaces
• Water-based, solvent-free, low emissions — apply in occupied buildings without disruption
• Overcoatable — apply standard emulsion paint or organic plaster over the top for any colour scheme
• Floor coverings compatible — carpet, vinyl and other floor coverings can be laid directly on the coating
• 3 sizes available — 125ml, 500ml and 1L to suit projects of all sizes

Order before midday for next-day UK delivery.

Rustins G-Shield is an excellent choice for EMF and electro-smog shielding across a wide range of interior applications:

• Bedrooms & Living Areas — Apply to bedroom walls and ceilings to reduce ambient EMF exposure from Wi-Fi routers, mobile phone signals and 5G transmitters. Overcoat with standard emulsion for a normal decorative finish. Particularly beneficial in urban areas with high levels of ambient electromagnetic radiation.

• Home Offices & Study Rooms — Apply to home office walls to reduce electromagnetic interference and create a lower-EMF working environment. The low-emission, water-based formula can be applied without vacating the room for extended periods.

• Commercial Offices & Meeting Rooms — Apply to office walls and ceilings to contain Wi-Fi signals within defined areas, improve data security and reduce ambient electro-smog for staff. The overcoatable formula allows application within a standard office refurbishment programme.

• Server Rooms & Data Centres — Apply to server room walls, ceilings and floors to provide RF containment and electromagnetic shielding. Ground with self-adhesive copper strips for large area applications to maximise shielding performance.

• Medical & Sensitive Equipment Rooms — Apply to rooms housing sensitive medical or electronic equipment where electromagnetic interference must be controlled. The NPL-tested shielding performance provides verified attenuation for specification purposes.

• Keyless Car Entry & RFID Security — Apply to a storage room, hallway cupboard or garage wall to block relay attacks on keyless car entry fobs. Thieves use relay devices to amplify key fob signals through walls — a G-Shield lined room prevents the signal from being detected. Also effective for protecting RFID cards, passports and contactless payment devices from unauthorised scanning.

• Floors — Apply to floors before laying floor coverings. Floor coverings including carpet, vinyl and other materials can be laid directly on the dried G-Shield coating, providing shielding through the floor as well as walls and ceilings.

If you need personalised advice on coverage, coats or grounding for your specific project, contact our experts via the live chat for tailored guidance.

Coverage: 5–6 m² per litre per coat

Coverage per size

• 125ml: Covers approximately 0.6–0.75 m² per coat
• 500ml: Covers approximately 2.5–3 m² per coat
• 1L: Covers approximately 5–6 m² per coat

Recommended coats

• 2 coats minimum for adequate shielding and coverage
• 3 coats recommended for improved durability and maximum shielding performance
• Up to 3 coats on walls and ceilings

Example calculations (3 coats)

• For a bedroom wall of 12 m²: approximately 2 x 1L tins per coat — 6 x 1L tins for 3 coats
• For a home office of 20 m² (all walls): approximately 3–4 x 1L tins per coat — 9–12 x 1L tins for 3 coats
• For a small test area of 3 m²: a 500ml tin will cover 1 coat

Important: For large area applications, grounding with self-adhesive copper strips up to 1 inch wide is recommended to maximise shielding performance.

For accurate project planning, we recommend ordering 10–15% extra to account for surface variation and porosity.

Surface Preparation

• All surfaces must be clean and free from grease and wax before applying
• If already painted, remove all flaking paint by scraping
• Remove all rust with a scraper before applying to metal surfaces
• Ensure the surface is dry and free from dust and contaminants

Application

1. Stir well before use until there is no sediment in the bottom of the tin
2. Apply liberally with a synthetic fibre bristle brush or roller
3. Allow to become touch dry — approximately 30 minutes
4. Apply a second coat after a minimum of 3 hours
5. Apply a third coat after a further minimum of 3 hours — 3 coats are recommended for improved durability
6. For large area applications, ground the coating with self-adhesive copper strips up to 1 inch wide to maximise shielding performance
7. Once fully dry, overcoat with standard emulsion paint or apply clean organic plaster if required
8. Floor coverings can be laid directly on the dried shielding coating
9. Clean brushes and rollers immediately after use with water

Drying Times

• Touch dry: Approximately 30 minutes
• Recoat interval: Minimum 3 hours
• Protect from rain for at least 24 hours after application

Important Notes

• Stir well before use — natural exfoliated graphite settles in the tin
• Apply liberally — do not apply too thinly as this will reduce shielding performance
• For maximum shielding, apply 3 coats and ground with copper strips on large areas
• Clean brushes and rollers immediately with water — do not allow to dry on equipment
• If brushes become hard, clean with Rustins Brush Restorer or Rustins Cellulose Thinners

Recommended System Products

Free delivery on orders over £75 — stock up on everything you need in one go and complete the job properly.

Paint Brushes, Rollers & Paint Trays — use a synthetic fibre bristle brush or roller for application; clean with water immediately after use

What does G-Shield protect against?
G-Shield provides reliable shielding from high-frequency electromagnetic fields (EMF) and low-frequency electrical fields. It provides incremental shielding attenuation of up to -57 dB per coat for frequencies up to 20 GHz and higher, including the 5G frequency spectrum.

Can it block car key fob signals to prevent relay attacks?
Yes. G-Shield can be applied to a room, cupboard or storage area to block the signal from keyless car entry fobs, preventing relay attack theft where thieves amplify the key signal through walls to unlock and start vehicles. It is also effective for blocking RFID signals from cards, passports and contactless payment devices from unauthorised scanning.

Has it been independently tested?
Yes. The effectiveness of G-Shield has been independently tested at NPL — the National Physical Laboratory and the UK's national measurement standards laboratory.

What is it made from?
G-Shield is based on a high-quality water-borne, cross-linking acrylic resin containing natural exfoliated graphite. It contains no metal particles.

What colour is it?
Black. It must be overcoated with standard emulsion paint or organic plaster for a decorative finish.

What sizes are available?
125ml, 500ml and 1L.

How much does it cover?
Coverage is approximately 5–6 m² per litre per coat. Two coats are the minimum for adequate shielding — three coats are recommended for improved durability.

How many coats do I need?
Two coats provide adequate shielding. Three coats are recommended for improved durability and maximum shielding performance. Up to three coats can be applied on walls and ceilings.

How long between coats?
Recoat after a minimum of 3 hours.

Can I paint over it?
Yes. G-Shield can be overcoated with all commonly used emulsion paints and applied under clean organic plasters.

Can floor coverings be laid on top?
Yes. Floor coverings can be laid directly on the dried shielding coating.

Do I need to ground it?
For large area applications, grounding with self-adhesive copper strips up to 1 inch wide is recommended to maximise shielding performance.

Is it water-based?
Yes. G-Shield is water-based and solvent-free with low emissions. Clean brushes and rollers immediately after use with water.

Can it be used outside?
Yes, protect from rain for at least 24 hours.

What temperature do I need to apply it?
Do not apply below 10°C or in conditions of high humidity.

Do you offer next-day delivery?
Yes. Order before midday for next-day delivery to mainland UK addresses. Contact us for delivery options to Scottish Highlands, Northern Ireland and other remote areas.

Technical Data Sheet

Safety Data Sheet

We recommend these system products to achieve the best results with Rustins G-Shield. Free delivery on orders over £75

Paint Brushes, Rollers & Paint Trays — use a synthetic fibre bristle brush or roller for application; clean with water immediately after use

Not sure how many coats or how much product you need for your project? Contact our experts via live chat for free, tailored advice.

Fast, Reliable & Fully Tracked UK Delivery

Every order is dispatched from our warehouse using a fully tracked DX or FedEx service, so you always know when your paint will arrive.

Delivery Options

• FREE Standard Delivery (orders over £75) Arrives in 2–3 working days
• Standard Delivery – £7.95 Arrives in 2–3 working days
• Express Delivery – £13.95 Next working day delivery when you order before 12:00 noon (Mon–Thu)
• Spending £75+? Select Express Upgrade at checkout and only pay the difference

Dispatch & Delivery Times (What Happens After You Order)

• Express delivery (order before 12:00 Mon–Thu) Dispatched same day, delivered next working day
• Standard delivery (Mon–Wed orders) Dispatched next working day, delivered 2–3 working days later
• Orders placed Thursday (standard delivery) Dispatched Friday for Monday delivery
• We do not dispatch or deliver on weekends or UK bank holidays

What to Expect on Delivery

Please provide a contact telephone number at checkout. This allows the courier to share tracking updates or contact you if there are any delivery issues.

Most orders require a signature on delivery. If you may not be available during the day, we recommend delivery to a workplace, business address, or another location where someone can sign.

Outside the UK Mainland?

Delivery prices shown apply to UK Mainland only.

For the Highlands, Islands, Northern Ireland, or non-mainland addresses, please contact us for a quick personalised quote via live chat, by calling 01482 222 421, or emailing info@specialistpaintsonline.co.uk.

Bottom Line

Order today, get fast and reliable delivery, track every step, and get painting without delays.