Roadware Flexible Cement II in concrete. May 27, 2015 400 × 300 All about Roadware Flexible Cement II™. A 600ml cartridge 91300 of Roadware Flexible Cement II repairing cracks in a concrete slab. Exterier. Share this: Click to print (Opens in new window) Print Click to email a link to a friend (Opens in new window) Email MoreTweetLike this:Like Loading...