Keep Mother Nature at bay with OSI Quad Foam. This single component, minimal expansion and low-pressure polyurethane foam sealant specifically designed for use with the OSI Quad Window & Door System or sealing gaps and cracks, holes and voids around windows and doors. OSI Quad Foam features a flexible closed-cell structure that blocks out air and water without cracking or drying out and provides an R factor of 5 per inch of cured foam for maximizing energy efficiency. The low-foam pressure and low expansion ensures your windows and doors will not bow or warp. OSI Quad Foam adheres to all types of building materials including wood, concrete, and drywall and is compatible with asphalt and butyl flexible flashing. It complies with all Federal and State VOC regulations. OSI offers an arsenal of adhesives, caulks, and outdoor construction sealants for the true professional. OSI: Tougher Than the Elements. OSI offers extensive online and offline training for contractors to protect your work with proper sealant application. OSI's Certified Installer Program offers training for all the right tips and techniques from industry experts for the highest quality installation to make every install a reliable, professional job to prevent window, door or siding problems. Find out how you can become OSI Certified and build your reputation. When you take either our e-learning courses through our online training program or in-field training, you get trained in the latest professional installation techniques. And upon completion, you receive a 15-year limited warranty on your installs, 4-Year Certification and access to job aids and Technical Customer Service Support.