EMFields Screening Products - RF Screening Paint
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We are not able to accept returns of paint.
"Shelf Life" applies to paint still in its container. This is the length of time before the paint becomes less effective. It does not apply to paint once it has been painted on a wall. The shelf life is approximately six months once the container has been opened, and 2 years if the container has not been opened. Once the paint is on a painted wall or other surface, it does not deteriorate in the same way, and will continue to shield the surface for years if not damaged. If part of the paint has been used, and the rest left for future use, when you re-open the container you may find that lumps have developed around the edges of the paint which have to be smoothed out. This is likely to happen to all paint, not just screening paint, but with the carbon molecules in the screening paint it can happen more commonly.
The paint can be used inside or outside and one coat covers between 3 to 8 square metres per litre, depending on how rough the surface finish is. E.g You would get 3 square meters per litre on rough plaster. On average, on an internal, primed wall, you'd usually get between 7 and 7.5 square meters per litre. If the surface to be painted is very porous and absorbs a lot of paint, it may be advisable to use a primer first. If you try to use the paint too thinly e.g. one litre of paint for 20 square meters, the shielding performance will decrease dramatically.
The paint is water-based, free of toxic solvents, plasticisers, film-forming agents, and allows the walls to breathe.
Preparing the surface for painting
Prepare the surface as you would do before using any other paint. If you are painting over a surface previously painted with gloss paint, then you must use rough sandpaper to roughen the surface, finer sandpaper to smooth it over and then you should be able to paint with the screening paint.
Applying the paint
Paint can be applied with a brush or a roller, or even a sprayer. Please see the instructions included with your paint and follow them carefully to ensure maximum effectiveness.
The paint will require at least 24-48 hours to dry. If the weather is sunny and dry, then it will be at the lower end, if the weather is wet and cold, it could take longer. If in doubt, leave the paint longer to dry. The paint needs to be dry all the way through the paint (chemically dry) and not just "touch" dry, so always leave more time when in doubt. If you put a second coat on too soon, the two coats will bond and you will not get the additional screening protection.
Wallpapering over the paint
Because the paint is free of plasticisers, film forming agents etc, if you wish to wallpaper over the paint, you need to apply a coat of emulsion paint to seal the layer of carbon paint BEFORE using wallpaper paste. This should avoid any chemical reaction between the paint and the wallpaper paste.
Earthing / Grounding the paint
It is not always necessary to earth / Ground the paint
The paint will screen RF fields whether earthed or not. However, the paint is conductive, so it may pick up ELF electric fields from the mains electricity wiring.
When to earth: In very general terms, you probably do not need to earth walls in upstairs rooms, unless you have screened the floor and ceiling as well.
If in doubt: Do a "before" and "after" test for ELF electric fields. Using our ELF meter, or another calibrated electric field meter, measure the electric field, standing on the floor at least a foot away from the wall once you have painted it. Make a note of the readings. Earth the paint, using one of our earthing leads (or earth it yourself using the instructions we supply with the paint, which are replicated below for your use). Measure the electric fields again in the same position. If the fields are higher once you've earthed it, remove the earthing lead. If they drop, leave it there.
Earthing/Grounding instructions (only if you have determined it needs doing)
Resources and picture examples
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