I'm starting to research recaulking between my bathtub (cast iron with, I believe, the original porcelain enamel) and the ceramic wall tile. I had been planning to use GE Silicone II Bath & Kitchen caulk, but a friend is advising using Polyseamseal Tub and Tile Adhesive Caulk instead. While he agrees the silicone is flexible, he says it can fail to adhere after a while. He says the Polyseamseal has very good adhesion, and is easier to apply (not important to me, I can handle silicone). He says the Poly won't last as long as silicone, but what does that matter if the silicone pulls loose. On the other hand, I've read that Polyseamseal dries "like a rock," and I realize that at a plane change flexibility is needed. Plus it's a wet (but not underwater) area, which I know silicone is good for. What do people here think? Thanks.