Rubber exhaust hanger directly against exhaust pipe? Will it melt/catch fire?

Seems like a dumb question, I know.

Wife's truck exhaust was "barely" touching a frame rail and vibrating. Access to the hangars to bend them is difficult, and basically it's "too high" not too low so replacing the rubber hanger parts won't solve the problem. so I took an old BMW exhaust hangar (the kind of thin ones where the rubber is like 1cm thick) and cut it and basically wedged it between the exhaust and the frame rail. It stopped the vibration.

I know hangers attach to the arms that come off the exhaust, but those probably aren't quite as hot as the pipe itself. Is there any danger of the rubber hanger melting or catching on fire when directly contacting the pipe itself? I would hope they have higher heat tolerance than that, but what do I know, lol....

note that this is a short-term fix for a few weeks until I can get the truck up and pull off the exhaust and bend it a bit. But I will be doing a long tow in the meantime so the exhaust will be getting to a pretty hot temp..

I'd imagine it won't like highway travel much. Probably depends on how close to the engine you are, as well. It may stink, but I doubt it will do much more than that.

I've been using pieces of fuel hose and other random rubber-ish bits sandwiched between exhaust pipes and body parts for years without issue. But, it's always been on the back half of the exhaust system.

Ive had several cars where the exhaust 'hanger' was more like a 'sitter on topper of this here rubber thing i hose-clamped to a nearby body bracket'. I honestly have never had any problem that tempted me to stop doing this.

Depends how far back it is. Way out by the muffler/rear axle area? Should be fine. A foot down from the cat? Not so much.

Yeah, this is where the exhaust goes over the rear axle, aft of the first muffler/resonator. So, on a Sequoia, it's a good 10 feet from where the cat is, lol.