Thankyou for letting me join your forum and ask a question. I'm looking for a caulk that hardens. It's what I used when I first installed my corner shower kit. It bonded to the shower walls, base, and the painted alluminum frame. Making it one solid piece. I had to chip it off with a screwdriver and hammer but it came off. It hardened like plastic. I don't know if it hardened like that because it had been there for 10 yrs. or so. It yellowed but worked great. I'm thinking acrylic is plastic and latex stays flexible. Do they make just an acrylic caulk or will it all have latex? Do you know if it's latex acrylic caulk I'm looking for? The manfacturer recommends latex acrylic caulk with less than 40% silicone but when I ask what name to look for. I was told it's hard to find and that was it. I can't use 100% silicone for sure because it won't adhere to the base. Thankyou.