I have a torpedo CFL like this one in a yard lamp fixture.
Under that plastic cover is a standard twisty CFL like these.
The plastic cover has come loose from the base. The residual adhesive
they used to glue it in place looks like the putty they used to use to
secure window panes in place. It's white and slightly rubbery.
I'm thinking it doesn't matter much what I use to glue it back in place.
I have epoxy and Gorilla glue. It is outside, but it's in a yard lamp
housing and this is a mild climate (Silicon Valley).