This will work.
Dear Valued Home Depot Customer, We reached out to MFG for more information and below is their response. “We appreciate your interest in the CM-2072 corner molding. This molding is manufactured from Swanstone solid surface material which is mold & mildew resistant. It has a matte finish and is available in colors that match our tub and shower walls. The corner molding is designed to fit in the corner of the tub/shower walls where the side panel and back panels meet. If you are inquiring about placing the molding horizontally between the walls and the flat surface of the tub deck, although not intended for this purpose, the molding could be used for this custom application as well. We appreciate you considering a Swan product for your home and hope this information helps you with your final decision." Thanks The Home Depot User Generated Content Team