Best glue to use for bonnet insulation

["Scott McKorkle" <bmc@aa.net>]

I recently bought some bonnet insulation panels from Northwest Imports. 
These panels are basically thick cloth with a rubber backing.  I used
standard contact cement to attach them--only to have them drop off the
bonnet after driving a few miles.

What type of glue/cement do you folks use to attach this insulation? 
Obviously, it has to bond rubber to metal and stand up to engine
compartment heat.

TIA.

Scott McKorkle
1978 MGB