3M provides Slim Lock Closure for fiber to the antenna

According to 3M, FTTA cell tower architectures require a different weatherproofing approach from the traditional tapes and mastics. The Slim Lock Closure is specifically designed with a narrow body to fit into congested areas, such as compact tower-mounted RRUs and connection-rich multi-band, multi-service antennas, 3M asserts.

The hard plastic closure body snaps around the connection and latches shut, sealing out water. A compliant sealing gel inside the closure conforms to the connection and displaces air so that condensation cannot occur, 3M adds.

A tower technician can install a Slim Lock Closure in a minute or less, without tools, 3M continues. Slim Lock Closures can be repeatedly opened and closed for maintenance and testing. Moreover, the closure can be re-entered without disconnecting the antenna and interrupting service.