I also called the roofing distributor and picked up a 5 gallon pail of adhesive. Turns out it is a Low-Voc version used for EPDM and/or TPO roofing.
It is a contact adhesive, so I guess I'll have to test it out on a smaller piece to see if it can be moved at all after putting the 2 together. Both surfaces get coated with the adhesive, allowed to dry a little bit, before putting them together.
To go with that, I needed something to stir it up, and make sure it is mixed properly. Enter a long drill powered mixing device.
