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JOINT-SHIELD™
Another format of MuMetal®, great for Magnetic Shield Protyping and for Joining Mag-Stop™ Plates
When you need more than one Mag-Stop Plate to cover an area, how do you handle the joints? Joint-Shield is the perfect solution! This is a generous .010" thick, fully hydrogen annealed magnetic shielding alloy with adhesive backing (rated 0 - 200°F) on one side. Simply butt the Mag-Stop plates tightly together, and "tape" over the seam with Joint-Shield high permeabilty alloy. This method offers much less bulk and better appearance than the old overlap technique and provides excellent shielding integrity. Simple to use: just cut to desired length with a heavy scissors, peel the protective backing and press into place!
Joint-Shield can also be used by itself as an excellent magnetic shielding material when a 4" width and adhesive backing is desirable (wrap it around wiring and conduit, speaker magnets, even small appliances like shavers and hair dryers!). Joint-Shield can be shaped by hand, without the need for special tools, but watch the sharp edges.
Click here for Specs on Joint Shield
4" wide. Specify desired length when ordering.
Joint Shield (Cat. #US277) .................................. $24.95/linear foot 
Joint Shield [100 ft roll] (Cat. #US277-roll) ...................... $2250.00
METGLAS® MAGNETIC SHIELDING FILM
Paper Thin and Highly Effective
Space-age technology has produced this unique ultra-high permeability (1,000,000+) magnetic shielding alloy. Unlike conventional Mumetal® shielding alloys which are nickel/iron based and depend on bulk for effectiveness, MetGlas is a cobalt based alloy which is only 0.00065" thick (that's 16 microns, a red blood cell is 8 microns across)! Thinner means less material is needed. Less material means less weight and lower cost. Easy to handle, too. Cut it with a scissors, shape it with your fingers, tape it in place. Flexible and tough, with moderate corrosion resistance, it can be used indoors or out. Near-zero magnetostriction means it can be flexed over and over without losing its shielding properties.
Wrap wiring, pipes, switches, or electro-magnets. Make shields for your shavers, electric toothbrushes, hair dryers, alarm clocks or lighting ballasts. Even lay it flat (in our experiments, we saw nearly 90% field reduction when a 4" x 4" MetGlas shield was placed flat against an energized lamp cord). Note: This material tends to saturate easily and is not recommended for shielding strong magnetic fields. This is the material often used in Electronic Article Surveillance systems. Formula 2714AZ, supplied annealed.
Supplied as a ribbon, 1" wide. Specify desired length when ordering.
Metglas (Cat. #US278) ………………….…… $2.50/lin ft
Also available in 1 pound spools (approx 500 lin ft), 1" wide.
Metglas (Cat. #US278-P) ………...….…… $599.00/spool
Also available in 24 pound (11 Kg) spools (approx 12,000 lin ft), 1" wide.
Metglas (Cat. #US278-11Kg) ………...….…… $2400.00/spool
Click here for Specs on MetGlas Film
Click here for Instructions for using MetGlas to make Magnetic Shielding "Fabric"
MagnetShield
High Saturation Magnetic Alloy
First line of defense for shielding strong magnetic fields from magnets, speakers, small transformers and motors. Strong magnetic fields are harder to shield because they tend to "saturate" the shielding material. This 4" wide foil is a hefty .010" thick and has an exceptionally high magnetic saturation of 21400 Gauss and maximum permeability of 4000. Tin plated for excellent corrosion resistance and better conductivity, it can be soldered or painted.
MagnetShield typically reduces fields up to a factor of 2 or 3 depending on size/shape of the shield. Can be used in multiple layers, and/or in combination with a higher permeability alloy such as Joint-Shield for higher attenuation. Annealing is not necessary with this material.
For increased shielding effectiveness, consider the following strategies:
- Good: Layer(s) MagnetShield
- Better: One or more layers of MagnetShield (closest to the source of field), followed by one or more layers of a high permeability material such as Joint-Shield or MagStop Plate.
Applications Notes:
- The magnets will be attracted to the shield (this is true of ALL magnetic shielding alloys). If you want to shield 2 adjacent magnets from eachother, each magnet should have its own shield.
- The size, shape, and position of the shield all matter in terms of shield performance. For example, larger shields are better than small shields. Closer to the magnet is better than farther from the magnet. And parallel to the magnetic field lines is better than perpendicular to them.
- You will likely need more than one layer of shielding material, depending on the strength of your magnets. More layers = more attenuation.
How do I stop the attraction/repulsion between 2 magnets?
Click here for Specs on Magnet Shield
4 Inch Wide Ribbon:
MagnetShield (Cat. #US274) ........................... $4.50/lin ft
MagnetShield [250 ft roll] (Cat. #US274-roll) ..... $844.00
Also available in larger dimensions:
MagnetShield Plate 36" x 15" x .015" (Cat. #US274-15) ….. $39.00
MagnetShield Plate 36" x 120" x .015" (Cat. #US274-30) ….. $259.00
PaperSHIELD
Light Duty Economy Magnetic Shielding
For small shielding job where you don’t need a high attenuation, this unique material is just the ticket. Only 0.010 inch thick, PaperSHIELD is flexible and can be easily cut with a scissors and shaped by hand into simple or very complex shapes. High saturation and moderate permeability make this ideal for shielding magnets. White paper on one side can be imprinted (by you), peel and stick adhesive on the other side permits easy and semi-permanent mounting almost anywhere. Magnets will stick to it nicely. Really great for experimenting. 36 inches wide. Made in USA.
PaperSHIELD (Cat. #US270) …....................… $14.22/ lin ft
PaperSHIELD 82 ft roll (Cat. #US270-roll) …..….. $875.00
MuMETAL® WIRE
Unique Shape for Unique Shielding Applications
Do you have an application requiring Mumetal® in un-insulated wire format? We have it in two different diameters! Stress annealed Mumetal® alloy. Wind it, weave it, braid it. Create toroids, coils, chains or simply experiment with its unique properties! Be the first to create a truly magnetic shielded garment! Spool size varies between 1-2 pounds. Click here for Specs on MuMetal® Wire
Note:
.005" wire yields approximately 13400 ft per pound
.025" wire yields approximately 530 ft per pound
Mumetal® Wire .005" diam. (Cat. #A275-5) .... Sale! Regularly $75/lb now only $55.00/lb
Mumetal® Wire .025" diam. (Cat. #US275-25) ….…..... $75.00/ lb
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Now achieve excellent and affordable magnetic shielding in difficult situations! Mag-
Stop Plates are extra thick high-efficiency magnetic alloy (Mumetal®) plates, specially designed to
provide superior shielding for electric circuit boxes, side by side computer users, and any
situation where you need a flat shielding material on a wall, floor, or ceiling. Can be
mounted with ordinary nails or screws, or sandwiched between the studs and dry-wall.
Use zinc chromate primer before painting. In one application, we were able to achieve almost 95% attenuation of a
200 mG field!
Method:
MµCord™ can be used to make extension cords and appliance cords. Simply cut wire to desired length and add a plug to one end, or plug one end and socket on the other. Easy to do with a screwdriver, instructions included. Rated for 15A – 125V
These plugs are suitable for North America. Plugs and sockets for other countries can be used, but you must obtain them locally. Color/style may vary. NOT made in USA.
