I have a 2000 24' FL. Refitting graywater tank. Is the white sealing compound (at the three ports on the tank) just standard pipe dope, as used in threaded pipe fittings? It is not adhesive, like a caulk or silicone rubber. Easy to scrape off with fingernail, and still pliable. And it has to be non-adhesive, otherwise you'd never the the tank off...
I'll be using t-bolt hose clamps on refit, as it seems to be at the limit of what worm-drive hose clamps are good for.
Chip
It sounds like pipe dope or plumbers putty, or putty tape. Putty tape and plumbers putty are essentially the same but in different form.
Chip-
On our 1997-8, LD used the "standard" polyurethane caulk/sealant of the time. As of a couple years ago, they were using Loctite PL S40 as the "standard."
Mark H