What is the best way to repair a cracked concrete garage floor that keeps leaking? We have already tried caulking it and it has still leaked. What is the best product? Epoxy or some other and should we make the crack bigger before we caulk. Help!!

Inquire about a concrete that expands when it dries, yes make the crack bigger and use this stuff.

Concrete Crack Repair Methods (http://www.radonseal.com/crack-repair.htm)

Leaking? Is this a very low foundation? No concrete floor below grade and in water will stay 100% dry. Just like a basement, it will leak. Patch all you want but consider jack hammering part of the floor and put in a sump pump pit it it takes on more water than you can tolerate.