This repair uses a solvent bas.
How to fix an uneven roof.
Clean the area thoroughly to ensure the primer gets a good bond before priming the area mix the crumb rubber epdm and eps expandable polystyrene beads with the greenslope adhesive using a bucket or bag.
For example soak the downhill side of a chimney first then each side then the top on both sides.
If a leak is difficult to find enlist a helper and go up on the roof with a garden hose.
Isolate areas when you run the hose.
Bulging or sagging roof coverings indicate damage to at least one portion of the roof structure.
For small ponding areas 3 x3 a 5 gallon kit can be used.
Start low soaking the area just above where the leak appears in the house.