On Tue, 06 Nov 2007 00:07:53 GMT, Short Wave Sportfishing
wrote:

There is a putty like substance that is sold for antenna work - it
seals connectors and entrance holes in buildings. It looks like tar,
but it's not - it's called Connector Seal, Coax-Sea and other names.
I've seen guys use it to plug holes in boats in particular aluminum
boats.

It's basically a rubber base compound and should dissolve with nail
polish.

Heck if you're going to go that route, why not use duct tape? I'm
surprised that no one has tried to build an entire boat from it. :-)