Interesting! Wish I'd tried this stuff when replacing the catalytic converter on my E300.

The second picture with the text seems a little contradictory. It says the paste hardens into a permanent seal, and then it says it prevents corrosion so dis-assembly is easy. Can't be very "permanent" if it comes apart?

I remember how pleasant it was to take apart the exhaust on my '85 wagon, much to my surprise. I had to remove it to replace the flex discs, and I expected a big fight but it came right apart at the joints. My '95 sedan was the opposite. One joint came apart just fine (it was two collars that pulled together and compressed on a one-time-use seal) but the other was a slip joint and it was not coming apart at all.

My inclination would be to use nothing, and then you should have an easier time getting the joints apart?

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC