I'm not sure if it's 777, but 3M makes a water base contact cement that you
can order from an auto parts store. I got mine from NAPA. I mentioned this
product to Defenders where I had gotten my headliner material, and i think
they then started stocking this cement.
If you use regular contact cement, it can soften and distort the vinyl, and
the fumes are pretty bad too. The water base cement has neither problem.
I had to get-- but needed --a gallon. Not sure if there are smaller sizes.
Costs about 2 1/2 times as much, IIRC, but goes 2 times as far.

"Marc" wrote in message
...
My headliner consists of a vinyl material glued to a thin plywood
panel fastened to the coach roof with edge battens and screws.
The vinyl is sagging and discolored and in need of replacement.
I can clean up the plywood panels and reuse them and I have a source
for the headliner material.

My question is about the adhesive. I've gotten suggestions that range
from Henry's Vinyl Tile Adhesive to 3M's 777. I'm looking for the best
product with the strongest bond, no bleed through and little
outgassing. Any suggestions?