[Porsche-O-Phile]

If you have water coming in (hydrostatic pressure) you will be able to permanently stop it from the inside. An epoxy injection might stop it for a while (few years) but the water will eventually find a new weak point and break through there.

To permanently fix it (if this is your goal - it might not be if you intend to sell in a couple of years) you need to excavate the perimeter and install a French drain and / or proper waterproofing membrane on the outside surface.

Sorry for the bad news but roll-on rubber products are just band-aids.