clare wrote, on Thu, 10 Dec 2015 17:25:31 -0500:

Mineral spirits and MEK are totally different materials.
Mineral spirits is closer to the right product but can have all kinds
of fraction in it that could inhibit proper vilcanization.. White gas
(coleman camp gas) is about as close to the "real thing" as he is
going to find at a big box store like Home Despot. - much better to
just get the right stuff

I think naptha is fine.

Lowes has it by the gallon.

What I'm trying to source now is that final goopy tar sealant.

Any ideas what it's made up of?