Andy wrote:
I want to caulk the space between the fiberglass tub and the sheetrock.
One side has about a 1/8 inch gap while another side is about 1/4 inch.

I don't want a 1/4 inch of caulking on both sides.
I will be using 100 % silicone.

All I can think about is fill in the gap with a thin piece of sheetrock.
Anything easier ?

Thanks,
Andy

You don't want 100% silicone. It should be anti mold silicone.

Greg