We just replace the bathtub spout. What can I use to seal off the spout where it meets the wall? The water pipe wasn’t attached to any stud in the wall, so the spout can pull out about 3/8" from the wall, although it meets the wall if you’re not pulling on it. There’s no way to gain access to the water pipe inside the wall or below from the basement. There’s no way to grab the pipe and attach the spout any closer in, either. I can’t really caulk the spout against the wall because of this play in it. The wall is a solid sheet of fake marble-looking stuff, like a composite sink vanity material.