It sounds like the pump is doing what it is supposed to do, remove water
above its level, which keeps the foundation dry. If you have that much water
coming through the "pinhole", you must have very high ground water. It is
better to remove it than have it sit that close to the house/garage.

Most sump pits have openings in the sides/bottom to allow water to enter. I
doubt that you can stop the flow, certainly not with something painted on
the inside.

"DGDevin" wrote in message
...
There is a small concrete pit right outside our garage containing a sump
pump that keeps our garage dry in the winter. There is a pinhole leak in
one corner, the tiny stream of water that comes in this hole after a heavy
rain eventually fills the pit which in theory is supposed to stay dry
while the drain channel in the driveway feeds the pump which is enclosed
in it's own plastic container. The problem is that long after it stops
raining this leak results in the sump pump trying to drain all the ground
water above the level of the leak. I'm looking for recommendations of
products to apply to the concrete in that corner which will seal the leak,
I've heard of paint-on products. Or do I have to bite bullet and slap
some hydraulic concrete all up that corner to have a realistic chance of
sealing the leak?