I am about to seal the gap between my tub and the wall tile with caulk (it was originally grout which cracked so I chiseled out what I could). I was planning to use silicone caulk (GE II), but a contractor suggested that pure silicone is not ideal since all caulk will eventually need to be removed and replaced and silicone is very difficult to remove. There's some logic to this, so I'm wondering - is he right? If so, what kind of caulk should I use?
That gap is to small. Push really hard with the float to completely fill it with grout, giving it one more shot; next time caulk it. Caulked tub surrounds are one of my pet peeves; I'm the one who gets to scrape that mess out.
Whether grout or caulk, I like Some Guy's advice: prestress the tub by filling it with water as you work.
Whether it is hard or easy to remove is really not that important, when it comes to choosing materials for this type of operations. One other thing is far more important: Silicone is organic matter, and like anything organic it disintegrates, especially in rooms like bathroom, which are humid. You should use grouting materials, same (if possible) like you have used for ceramic tiles.
