The primary function of Siderise® CWFS (Curtain Wall Fire Stopping) system is to provide a continuous perimeter fire, smoke and acoustic seal by sealing the void between compartment floors and walls and the external building envelope. Tested for building movement before fire test. Siderise® CWFS is a foiled stone wool cavity barrier system engineered specifically to handle building movement whilst maintaining the fire, smoke and acoustic seals. Siderise® CWFS systems utilise a unique method of manufacture that provides a well-identifiable, ready-to-use product that is resilient in lateral compression. The factory-manufactured material facilitates fast, clean and easy installation, ensuring a requisite tight fit and enhancing fire, smoke and sound integrity. Siderise® CWFS systems have been fire tested and approved to AS1530 Part 4 as well as the more representative European fire test method EN1364.4 for up to 3 hours performance (-/180/180). The EU test method actually includes a slab-edge interface with a curtain wall and includes cyclic movement before testing to evaluate real-world performance. Check out a video of this EU test online here: EN1364-4 Aluminium Curtain Wall Fire Test