I found this modular (3-piece) 3-sided plastic tub/shower surround installed at a recent renovation. I can't find any identifying information on it, nor can I locate the contractor who installed it.
There are deep 1/8" gaps between the three pieces of the surround, as well as between the surround and the tub. Should I be filling these gaps with silicone caulk?
Here is the (horizontal) gap between the surround and the tub:
And here is one of the vertical gaps between two of the pieces of the surround: