# J- E& C- w+ t+ ~7 w* }% `(DIY) buy at HD, apply leak seal from inside OR. e$ f" {# ?- U r9 M, ~6 w5 [
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hire some professional company that armed with high pressure injection equipments to do the leak plug.
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should work, high pressure injection is the best and have lifetime warranty. . M5 J, t% t& O+ G- T( W. ?) M2 K; v; T$ U7 D! h
hairline cracks not going all the way through wall is not unusual, / x1 Y4 A: ^+ T( K: ]6 _/ o9 B3 o0 K
big crack is rare, if possible, I rather back off