Just saw this….I stumbled onto the tan JB Weld as well 6 or 7 years ago after trying a few other things, mostly unsuccessfully. I had no idea though that there was a mixing tip! Genius!

I’ve got to replace both rear door vapor barriers and am expecting the worst, so I need to stock up.

What is the black goo used to attach the vapor barriers to the door and create a water proof seal?

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Current
Original owner 2002 E53 X5 4.4i to 4.6i swap
2026 G80 M3 6 spd
2025 G06 X5 50e
Former
1972 Audi Fox
1986 Saab 900S
1996 BMW Z3
1998 BMW E36 M3 Sedan
2004 BMW E46 M3
2006 Audi A3 Quatro
1993 Mopar 318 Jeep Grand Cherokee
2015 V6 Jeep Grand Cherokee