M-D 90-ft x 1/8-in Gray Caulk Cord Rubber Window Weatherstrip in the Weatherstripping department at Lowes.com
Magic Tub and Wall Peel & Caulk Strip - Create a Tight Seal Between the Bathtub and Wall to Keep Moisture Out - 1-5/8" by 11' - White : Amazon.ca: Tools & Home Improvement