There are three main reasons why we recommend that you do not need to use sealant:
- Regardless of how much sealant and pressure you apply to the terminal, we do not believe that you will completely fill the cavity, thus leaving a small air pocket which will get some water in it (usually somewhere near the centre of the cable where it is difficult to get at). Stainless steel has a very thin oxide layer which is one of the features which makes it stainless. Over time it is possible that the oxide layer next to a small air pocket may become damaged due to a chemical reaction between the stale water in the air pocket and the oxide layer. This will eventually expose the chromium which is no longer protected, rendering the material weaker. In our opinion it is safer to allow fresh water into the terminal on a regular basis which not only clean and wash away any built up salt residues but will also maintain the oxide layer of the stainless steel.
- The main mechanical components of the compression fittings are manufactured from stainless steel grade 316. This material has high anti-corrosive properties and is ideal for use in a constant sea-water environment. The design of the terminal and its components has been developed in such a way that it is acceptable to use this material. Other designs of this type of terminal may not benefit from these design features.
- The design of the compression terminal is such that you can dismantle the terminal at any time allowing you to inspect and clean the internal components and then re-assemble and use again without the need for any new parts. When you dismantle the terminals, the wires and components usually remain in place. If you use a sealant, it would make this operation very difficult and you may not be able to see all of the inner components properly.
