What is the best way to keep a cast dry when showering? 6 August, 20158 August, 2015 emkfoundation First Aid & Health A double (supermarket) plastic bag with tape is 100% effective, as are (expensive) commercial products. Share this:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window) Related emkfoundation A&Edepartment