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WMF200 is a specialized magnetic shielding film made from an amorphous cobalt alloy, designed to shield against Low-Frequency (LF) and High-Frequency (HF) radiation. It is easily cut, allowing you to create customized shapes and sizes to fit any area, and is also highly resistant to corrosion, even when exposed to humid temperatures.
The attenuation of the material remains constant at 40 dB at 1 GHz, even when under high stress. The cobalt strips makes the WMF200 very flexible, while still remaining solid so that it can keep its shape. Since these strips are so thin and thus quite sharp, the film is laminated to provide protection; it is this lamination that also prevents corrosion.
Processing
It can be difficult to glue the material without causing creases, and so it may be best to cover the area with solid wall coverings. When using the film on walls, ceilings and floors, we suggest that you use a highly viscous adhesive which adheres to non-absorbent substrates. First, smoothen the glue, then lay up the film, and finally apply it with a pressure roller or similar tool. The sheets should overlap, and then can be painted over if you so chose.
Grounding
WMF200 is electrically isolated. In order to ground the film, the strips must be screwed with a chopper disk which penetrates the plolyester.
edward j. kopacz
Reviewed in the United States on February 27, 2023
My IPhone’s internal magnet , which center’s it w/Apple’s surface charging system, ALSO STOPS MY BATTERY POWERED WRISTWATCHES. I tried to shield th iPhone , if I pick up my iPhone, it’s magnet i s then close enough to disrupt the watch’s operation. I spoke to Tag Heur’s customer support but they had no solution , other than Apple providing a magnet shield for when the way is NOT BEING CHARGED, and being used as it is normally !
D. Perez
Reviewed in the United States on January 19, 2022
I had some audio feedback from my home theater center speaker due to a tone control unit I have placed on top of it. I cut the magnetic shield to size and placed it between the two components and voila, feedback gone. It’s pricey for such a small piece of paper but it solved my problem and I’m satisfied with the results.
david albert
Reviewed in the United States on December 7, 2021
First, I thought this was tape with adhesive. It is not. There is no adhesive so it does not stick to anything. Second, after I sprayed this plastic film with 3M 77 contact adhesive and carefully wrapped my JL Audio speaker magnets with 2 layers, they still caused my Ritchie compass to move when placed 18 inches away. If it was blocking magnetic fields, the compass should not move. Expensive and doesn't work well.
DM
Reviewed in Canada on August 21, 2020
très efficace pour le 60 / 120 Hhz
Christopher Brown
Reviewed in the United States on September 3, 2019
I had some 60hz noise in my stereo introduced by my VPI ADS through an Icon Audio Step Up Transformer. I wrapped my SUT in the shield and all the interference is gone.
Sean L
Reviewed in the United States on July 18, 2019
I had a small hum affecting my headphone amp and this shielded the power toroidal from the other transformers reducing the hum to acceptable levels.
BG
Reviewed in the United States on October 5, 2019
Works quite well! Exceeded my expectations.
MARK HUANG
Reviewed in the United States on September 18, 2018
Bought this shielding film to cover a breaker box in my living room. Managed to reduce the field from 200mG to 40mG with just one layer. Works best if you have a small area to cover, otherwise request for a larger sheet when ordering to cover a larger source.
B Carson
Reviewed in the United States on November 27, 2018
Did exactly what I needed it to do, was on time, and reasonable price
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