I am looking to mount a piece of trim to "finish" the tub - skirt join. All pieces are cultured marble. What should I use for adhesive?

Thanks in advance.

I'd use something like DAP's tile adhesive and caulk. DAP 18001 KWIK SEAL Tub & Tile Adhesive Caulk - White - Home & Garden - BizRate - Compare prices & buy - Discount - Price