Another essential item for the engineer, mariner, radio enthusiast and the handyman in general.
This is a 10 metre roll of self amalgamating tape, which you use by stretching it to almost breaking point before application to the joint that you wish to seal or weatherproof. Stretching the tape whilst wrapping it around a joint causes the tape to 'weld' itself together. The only successfull way that I know of to remove this tape once applied is to cut it off with a knife, it seals so completely.
This is a big roll of self amalgamating tape, and should last you for ages, considering it is 10 metres long before you start stretching it !