I've just spent two very frustrating hours attempting to affix a Borika mount to my sib.
Cleaned with solvent, masked up, mix the 2 part adhesive, apply 2 part adhesive, leave to go tacky, apply another coat of 2 part adhesive, finally apply the third coat of adhesive.
Leave to dry, heat with a heat gun. Fix Borika mount in place and watch it fall off!
Clean off failed adhesive repeat above steps and watch it fall off again!
Sit with a mug of coffee feeling totally p1ssed off and read the label...........
2 Part Hypalon Adhesive, I'd pick up the wrong tin