Outside Steel Conduit Joints.

The over painting of joints that are dry but gorilla tight , and in extreme locations over-taping with self-amalgamating insulation of screwed joints as well after assembly is normal in the Mil Spec world. Usually khaki or sand coloured paint though.  (If you can pick it up, walk around with it, if it moves salute it, if it is not moving then paint it…  the joke is not quite true but almost)

To be honest, with liquid sealants, if you actually do the conduit joints tight, so they really cannot be undone, rather than finger tight and rely on the goo, then the joint will almost always be electrically conductive.

Liquid conductive silver paint or even silver flake loaded epoxy is sometimes blathered about on some RF connectors. In my experience it's over-rated and nothing beats solder, or a good mechanical joint with lots of force and then encapsulated. You will also come across positive pressurized conduits in places where it really matters, where dry air or nitrogen is pushed in to drive anything else out.. 

In other cases you may ask whether it matters if the conduit is full of water - that rather depends on the cable inside it and what happens at the joints.

Mike.

The over painting of joints that are dry but gorilla tight , and in extreme locations over-taping with self-amalgamating insulation of screwed joints as well after assembly is normal in the Mil Spec world. Usually khaki or sand coloured paint though.  (If you can pick it up, walk around with it, if it moves salute it, if it is not moving then paint it…  the joke is not quite true but almost)

To be honest, with liquid sealants, if you actually do the conduit joints tight, so they really cannot be undone, rather than finger tight and rely on the goo, then the joint will almost always be electrically conductive.

Liquid conductive silver paint or even silver flake loaded epoxy is sometimes blathered about on some RF connectors. In my experience it's over-rated and nothing beats solder, or a good mechanical joint with lots of force and then encapsulated. You will also come across positive pressurized conduits in places where it really matters, where dry air or nitrogen is pushed in to drive anything else out.. 

In other cases you may ask whether it matters if the conduit is full of water - that rather depends on the cable inside it and what happens at the joints.

Mike.