The ISO-CONNECT EPDM SEALING COLLAR is a sealing system for windows in the facade that are exposed to the harshest weather conditions. This collar is made using our EPDM OUTSIDE FOIL. Special features include the corner connections which are vulcanised at the factory creating an extremely tear-resistant and permanently tight seal for these corners. for more product information: https://www.iso-chemie.eu/en/sealing