Is there something other than caulk to put around a tub?

Therese, I don't know of another substitute for caulk, but here are some instructions on caulking and re-caulking a tub. Hope this helps!

https://www.hometalk.com/diy/floors-ceilings/how-to-re-caulk-bathtub-4954758

https://www.hometalk.com/diy/repair/plumbing/how-to-caulk-a-bathtub-beautiful-results-6490363

Caulking is easier if you cut the tip very small. Then, using a wet finger, run your finger across the very thin bead of caulk. This smooths it and presses it into the seam. One more thing, make sure all the old caulk has been removed before you begin.

A couple more resources:

https://www.thisoldhouse.com/how-to/how-to-caulk-around-tub

https://www.youtube.com/watch?v=AcgErpZ_D0c

They make a rubber sealant on a roll you can use instead of caulk. I always finish caulk with my index finger tip, keeping it damp. It turns out better than any finishing tool I have ever tried.

Using painters masking tape above and below the area to be caulked, will help keep it near with sharp edges. Then wet finger smear caulk on. Finally remove tape