We firmly believe that it only matters if it actually works. When Tech Protect was started back in 2011, being preppers ourselves, we had a unconditional rule that if it doesn’t work then we don’t use, promote or sell it.

Especially when it comes to EMP protection there are SO MANY conflicting opinions out there. Items from ESD (electro static discharge) bag to trash cans and many other things we heard that they worked and didn’t work. After doing some thorough research and finding out that the “Cell Phone Test” and the “Radio Test” are only some what reliable ways to test for EMP, we set out to have our faraday bags tested so we could guarantee real EMP protection.

Our bags were tested by NASA with a complete test using Gamma Radiation and testing the EMP bag to breaking point. Here is what NASA found:

Because Mil-B-81705-Rev-C bags utilizes the most current metalizing technology, its moisture barrier performance exceeds foil laminates for low Moisture Vapor Transmission Rate (MVTR), particularly after flexing. The multiple layer construction of Mil-B-81705-Rev-C bags provides full protection against ESD, EMI/RFI and tribocharging.
The multiple laminated layers also result in a better light barrier performance than many black interior polymer structures.
Successfully used by NASA in a project involving exposure to a 4.5 MEV electron beam or 300 mega-rad; 6x the 50 Mrad common in Cobalt-60 gamma radiation.

Electrical Properties:
EMI Shielding (MIL-B-81705-Rev-C): >40 db Between 1 & 10 GHz
Resistivity-Conductive Metal Layer (ASTM D-257): <2 Ohms/sq. in. avg.
Surface Resistivity (both surfaces) (ASTM I-257 @ 12% RH): <1012 Ohms. sq. in.
Static Decay (FTMS 101C, Method 4046.1 5000 to 0 Volts): <0.05 Seconds
Capacitive Probe Test (High Voltage Discharge) – (EIA-std 541/Appendix E-1 KV): <8 Volts
Charge Generation-nominal (Modified incline plane Avg. nC/sq.in.):
*PTFE Fluoropolymer: -0.09
Quartz: +0.10

Physical Properties:
Total Thickness: 7.0 mils
Light Transmission (ASTM D-1003-77) <.01%
Tensile Strength (ASTM D882-83 Method A) 735 lbs.
Tear Strength: (D1004-66 – Notched) MD: 5.8 lbs.
TD: 7.5 lbs.
Burst Strength (FTMS 101-C Method 2007 1a) >130 psi
Puncture Strength (FTMS 101-C Method A) >38 lbs.
Elongation (ASTM D822-83 Method A) MD: 40%
TD: 74%
Heat Seal Strength (ASTM D-1876-72 Vertrod Sealer) >11 lbs./in width
MVTR (ASTM F-1249 @ 100°F 100sq. in./24 hrs) <.0006 gms
OTR (@ 100% Oxygen 100 sq. in./24 hrs) ASTM D-3985 77°F @ 90% RH <0.0005 cc

Contact Corrositivity:
Low Carbon Steel, Aluminum, Copper, Ag plated copper foil, Sn-Pb coated copper foil, No Evidence of Corrosion or Etching of Metal

Technical Specs:

*Resistivity-Conductive Metal Layer (ASTM D-257): <2 Ohms/sq. in. avg. *Surface Resistivity (both surfaces) (ASTM I-257 @ 12% RH): <10 12 Ohms. sq. in. *Static Decay (FTMS 101C, Method 4046.1 5000 to 0 Volts): <0.05 Seconds *Capacitive Probe Test (High Voltage Discharge) – (EIA-std 541/Appendix E-1 KV): <8 Volts *Charge Generation-nominal (Modified incline plane Avg. nC/sq.in.):Teflon: -0.09 Quartz: +0.10 Physical Properties

*Total Thickness: 7.0 mils *Light Transmission (ASTM D-1003-77) <.01%

*Tensile Strength (ASTM D882-83 Method A) 735 lbs. *Tear Strength: (D1004-66 – Notched) MD: 5.8 lbs.TD: 7.5 lbs. *Burst Strength (FTMS 101-C Method 2007 1a) >130 psi *Puncture Strength (FTMS 101-C Method A) >38 lbs.

*Elongation (ASTM D822-83 Method A) MD: 40%TD: 74% *Heat Seal Strength (ASTM D-1876-72 Vertrod Sealer) >11 lbs./in width MVTR (ASTM F-1249 @ 100°F 100sq. in./24 hrs) <.0006 gms OTR (@ 100% Oxygen 100 sq. in./24 hrs) ASTM