Cracked shower base April 22, 2025 at 1:38 pm #52110 Tory JonKeymaster Joined: Nov 2019 Posts: 602 Likes: 838 LikeUp3:: Hey Lisa, assuming the crack isn’t too large or in a high flex area, JB weld should work. Just make sure you get the right type of JB Weld for the type of material your shower is.