For you guys that repair broken wires in and around the engine area or other places that has gas or oil contaminates.

This is a dual wall heat shrink that will not come apart due to gas, etc.
It is a special heat shrink that seals as it is heated. The standard heat shrink at radio shack and auto zone, etc is not dual wall and will not seal totally.

Liquid tape and electric tape will degenerate in oil.

I solder all connections. I use the western union splice before I solder.

If you have to use splices, use the self sealers.

There also exists some triple wall heat shrink . It ain't cheap.

Trying to help before I forget all this stuff.

I got asked this question, thus the post.

Shrink Tube - Dual Wall