Forsch Polymer urethane
Forsch Polymer Kit: Two part 60A, comes as a two part kit consisting of Part A and Part B
Informational sheet

Urethane to metal primer Part # ADH1001
Informational sheet

I bought my supplies from McMaster Carr, You have to search the
McMaster site using part numbers, # 8644K24 for the casting compound and # 8644K32 for the primer. At the time I purchased my kit the price was $33.50 for the casting compound and $11.50 for the primer, plus shipping.

I calculated I would need only one kit to do both mounts but since my damming devices didn't quite work out I will be using two kits. There is more than enough primer in the small can to do the set so you will only one can of primer.