I didn't want to purchase a new shower door kit as we plan on remodeling the bathroom in the next five or so years, so I had to deal with the horrible old existing sliding doors and track. The bottom track is not just an edge with a small guide for the hanging doors; it has two tracks that run it's entire length. It is a pain to clean as the shower enclosure is not quite level, so water accumulates on the low side. Below is an image similar to the style of bottom track:
I drilled an additional drain hole to allow more water out near the low side, but I still have to deal with the joint between the track and the vertical side piece. I didn't want to mess with silicone sealant as the clean up is a pain so I used ACE Hardware brand tile and tub acrylic caulk, which has worked great around the sinks in my kitchens and bathrooms.
I let the caulk cure for three days as stated on the tube and I noticed that in that low corner where water is standing for many hours after taking a shower, it is dissolving. Any thoughts on why this is happening? Is this to be expected? Will silicone stick to the acrylic caulk? Can I dry it out and use silicone on top of the corner now to get me by for several years? Would a marine epoxy be a better solution in that corner?