So I purchased a set of 05 calipers, and I was cleaning them up and touched the gasket on one of them with the wire brush. Tore a small (>1mm) hole in the gasket around the piston.

I was wondering if brake fluid is in the gap around the piston, or just behind it? Basically, I am wondering if I need to replace this gasket or just let it be. I've got some time, and need to make a trip to the dealer to pick up some things.