Prepare a mortar bed in record time - with SpeedSlope Rapid Setting Sloping Mortar – from Custom Building Products. SpeedSlope is a polymer-modified cement-based mortar bed that’s pre-blended. Just add water and mix! SpeedSlope’s advanced formula cures in as little as an hour. It’s ideal for floating shower floors on fast track projects! Installation is easy when you follow these simple steps. First, review the Technical Data Sheet online for the most comprehensive details and coverage charts. View the video in this post for step by step instructions on how to install SpeedSlope.