Sealing chilly joints the place separate concrete pours meet prevents lateral water stream as a result of foundations—

https://www.scribd.com/document/989458240/Sump-Pump-Replacement-How-Often-Should-You-Replace-Yours-124862

Sealing bloodless joints where separate concrete pours meet prevents lateral water action by foundations—and is important for robust airtight outcome around the world else inside of too!