3M Cold Shrink Sealing Kits CXS Series offer a safe, easy way to reliably seal connections on coaxial cables. 3M Cold Shrink is ideal for wireless communications towers and other exposed coaxial interfaces.Each 3M CXS Series Cold Shrink Coax Sealing Kits includes a cold shrink EPDM rubber sleeve which is factory expanded and placed on a removable plastic core. Prepare the connection, position the tube and unwind the pre-scored core. The natural tendency of the rubber sleeve to return to its original diameter provides constant radial pressure, forming a reliable, water resistant seal. All without heat, special tools or a time consuming installation procedure. Easily removed when system maintenance is required.