Should do. Just points to a post further back.
I can confirm Hylomar EAP5 is excellent.
It’s funny. For the gigabytes of bandwidth on the US Socata owners group regarding leaking exhaust clamps, and Socata’s relentless price hiking of 20-30% a year (these clamps and ‘special’ bolts now cost several hundred €) even to the extent of me disagreeing with the forum owner and eventually getting booted out of there because that is not allowed, putting this paste inside the clamp will make it last 10x longer.
Thanks. That probably explains it…
These fillers have the potential to make an exhaust system last a lot longer, by blocking hot escaping gas which erodes the metal. This is how the crappy Socata exhaust pipework ends its life
and these pipes cost ~ €2000 each.
Peter, the first product you used is meant for improved sealing where two exhaust pipes are connected by a sliding joint. It acts as a lubricant to aid assembly and then helps to provide a gas tight seal. It is not meant to fill gaps.
The second product contains fibre glass and is meant to fill gaps, usually with the addition of a heavy foil to help keep it in place. It too will blow out if the gap is too large and it is not foil supported.
Another interesting bit: I ordered some of that Holts stuff mentioned in post #1 (because the local car shops didn’t have it) and instead got Hylomar EAP5 which sounds like it might actually work.
Based on some tests I think the Holts stuff would actually work if one could heat up the exhaust (by running the engine) gently, without there being exhaust pressure, which is of course impossible 
The stuff stays in place, provided it can see the high temperature without pressure, first.
I used the Holts Firegum on my TB20 exhaust clamps and it worked well.
It does take a long time to air cure at ambient temperature, so I heated up the exhaust with a hot air gun to get it to solidify. On first start up it all stayed in place and there were no leaks.
I tried that but could not make it work, for a couple of reasons:
