We had a cellar that leaked bad growing up, sometimes 4-5ft deep. My brothers and I would swim in it sometimes!!
Anyways, we ended up sealing it from the inside several times and it finally stopped leaking. We went another 10-15 more years with no problems until we moved. So, with that said, I don't think you'll have to seal the outside, I'd start inside and see if that works first.
Anyways, we ended up sealing it from the inside several times and it finally stopped leaking. We went another 10-15 more years with no problems until we moved. So, with that said, I don't think you'll have to seal the outside, I'd start inside and see if that works first.