3M copper foil tape 1125 is typically used in a variety of EMI/RFI shielding applications such as shielding small electromagnetic components, repair and modification of printed wiring boards, flat conductor assemblies, prototype designs, supplementary shielding of joints and seams and shielding cable splices. - 3M 1125 tape consists of a 1 oz rolled copper foil with an acrylic, pressure sensitive adhesive. Acrylic adhesive with excellent bond strength. Supplied on a removable liner for easy handling and die-cutting. Has a backing thickness of 1.4 Mil.