: I need to glue some Cordura fabric to a slick fiberglass seat. I don't want
: the adhesive to telegraph through to the outside of the fabric. What type
: of contact cement should I use?

I would try using one of the sprays (3M 77), building up several thin coats to seal the fabric. The brushing or spreading required by liquid or gel glues would tend to force the glue through the weave.