My cabover windows leaked. I used a leaf blower and soapy water to find the leaks. It was important to keep the blower at least 3=4 feet from the windows or you just overpowered the seals. Very apparent with slideout seals. the Air just went right past a non-leaking seal as the blower got close. Don't know what kind of overpressure the sealtech uses but that might be a factor in the number of areas targeted.
. Some of the fittings like the water inlet may have to be removed new caulk applied.
The dicor sealant usually does not have to be dug out and redone. Simply clean, fill any cracks and then I apply a fresh layer of dicor over the old as long as it is not lifting.
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