yeah aeroseal takes your money and leaves you with leakage
they can't address. that is why they went out of business here.
they can't seal gaps over 1/4"..and those are the huge sucking
holes. give me a bucket of mastic and a roll of mastic tape
anyday!
describe your returns.
do you have a return chase with the filter on the wall low
to the floor or high up in the ceiling?
returns can be sealed, I do it all the time.
best of luck.
The cure of the part should not be attempted without the cure of the whole. ~Plato