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Force Field Wireless:

This specially formulated flat interior paint can help reduce the transmission of wireless radio waves through walls, ceilings and doors. Create a field of protection inside your home or office. Some radio waves may pass through depending on signal strength and other conditions.

DefendAir Radio Shield paint is an acrylic latex paint ensuring long-lasting color and durability. Because this is a latex paint, it is non-toxic, non-flammable, and non-hazardous. It can be applied by sprayer, brush or roller just like ordinary latex paint. Clean up with soap and water. Contains 1 Gallon (128 fluid ounces), and covers approximately 160 Sq feet.