I see conflicting information in some of the posts - I'm using the black 3M contact adhesive as recommended but i'm not completely clear if I remove the tape and apply it on top of the existing adhesive on the gasket, or just apply to the tape and so the tape will remain in the middle when I stick it together..
I tried one window yesterday but completely messed it up.. I took the white tape off, applied contact adhesive to both sides, waited ten minutes and then stuck them together. That all seemed to go fine but then I sprayed the gasket and window with silicone spray to keep it lubricated as recommended by Andy and Inland but I think I sprayed too much which seemed to melt the glue from the gasket and caused the gasket to slide off the window frame and the whole thing to come apart
I've now got the rest of the windows prepped and ready to go.. just don't want a repeat of yesterday!