Duradek Authorized ApplicatorDuradek, The Original sheet vinyl membrane for waterproofing decks and balconies, was developed to solve leak problems almost 40 years ago. All Duradek sheet vinyl is designed for strength, stability and slipresistance. Duradek waterproof vinyl flooring is only installed through a network of Authorized and Trained Installers who ensure the application is done right! more... See more text