Here's the problem:
Starting from the bottom course, my plan is to use a heat gun to soften them until they lay flat, then put a bead of roofing cement from a caulk gun along the bottom edge of the shingle and press it into the one below while somehow keep weight on it for a hour or so. When I looked at the cements in my local Ace Hardware store, none said anything about this use. All the brands mostly mentioned sealing cracks and seams.
Any other suggestions?
Thanks,
R1