I had been using 3M 77 spray glue but they have changed the formula. I currently have a can of 3M 90 spray glue, it is suppose to be stronger than the 3M 77. Scamp uses a contact cement but  I don't know who makes their red glue.

First off, ratfur will stretch  so be careful. There are ratfur trim strips covering seams running down either edge of the ceiling.  Open up the seam near the droop. Spray glue between the rat fur and refletix  or refletix and the shell. Spray glue on both sides of the separation, wait a few minutes then press together the spray glue acts like a contact cement. The ratfur trim strip can be glued back in place with a hot glue without making a mess.

Eddie