AKICIF: Flammable waterproofing?

[jeriendhal]

Can anyone name a chemical commonly used from circa 1870's to the 1930's for tents to waterproof them, but might also make it more vulnerable to fires? (think the doping on the skin of the Hindenburg)

Comments

[secoh.livejournal.com]

part of our national dress is the oilskin coat :D http://en.wikipedia.org/wiki/Driza-Bone
Flammable but it needs a good fire to get it going. It's not like a cigarette or spark will ignite it.