[VintageLambo] Water Pump Leak

I have a small leak from the water pump (original) of my 69 Espada. Years ago I had a leak on the pump of my Islero. Talking with Bill at GTCP at the time, he said he doubted that it would be rebuildable as with time the parts fuse together from corosion etc. That was the case so I replaced the pump. I was wondering if it would be prudent to first try some Bars Leak on the Espada. I know the product has been around for many years. Anyone had any experience with Bars Leak? Any negatives connected with using it? Bill Overhauser Phoenix