"William Munny" wrote in message
...
I'm trying to waterproof the top edges of some wooden bathroom cabinet
doors that get dripped on from the sink top. The top edges are beveled at
45 degree angle to the counter top so the wood is kind of rough rather
than well finished. The Minwax polyurethane I'm using just sinks into the
wood and is absorbed rather than drying to form the clear barrier I'm
looking for.

Is there another product I should try-- or just keep adding additional
coats of polyurethane?

Depending on how much you have now, but may be too late but the first step
is to burnish the ends. Take a smooth metal tool, like a shank of a
screwdriver, and rub it across the end grain. It smoothes down the fibers
and takes finish better. Keep adding until it is finally sealed. I usually
thin the first coat and then use full strength on the rest.