How to adhere edge of bullnose tile to drywall as trim for shower/tub surround
The correct solution leaves a small gap at both ends of the bullnose to silicone to those surfaces. The correct way to adhere the bullnose is thinset in the hollow portion of the tile but that doesn't seem totally feasible in this case, you could reattach with polyurethane construction adhesive down the center of the bullnose or something like schluter kerdifix which is a tile specific adhesive using a small 1/8&quot;spacer to keep the tile off the two surfaces. Then 100% silicone along the gaps at the drywall and tub face