On Fri, 19 Jul 2019 05:18:35 +0700, John B.
wrote:

While I never patch a rubber boat in the N. Sea I did have a "rubber"
dinghy with one of my sailboats that leaked, There was a place in town
that actual built rubber dinghies and I went to them for help and they
gave me a half tube of "glue" and some patching material which was
just the same material that the dinghy was built with which was a
single layer of some sort of "cloth" with rubber on both sides all
bonded into one sheet of material.. The glue had to be kept in the
fridge for some reason, perhaps because it had been opened.

The technique was the same as a inner tube - blow it up find the leak,
mark the leak with a magic marker, deflate, sand the leak area and
spread glue on both the tube and the patch, let dry and than apply the
patch and clamp in place with two pieces of wood and a C clamp.Come
back tomorrow and inflate it.
Worked every time.

It's more fun to do a hot patch.

Old School Vulcanizing Tire Patch
https://www.youtube.com/watch?v=ennV0BVFZVw
(Notice how he leaves the can of mineral spirits wide open while he
has an open fire burning a few inches away).

Today, electrically heated tire vulcanizers are safer (but less fun):
https://www.aliexpress.com/item/32634935852.html

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558