Genuine OEM Volkswagen HVAC Heater Core Seal Strip, part number 7L0820061. This sealing strip is specifically designed to create a tight, leak-proof seal around the HVAC heater core, preventing air or fluid from bypassing the core and ensuring efficient heating performance. It is a critical component for maintaining the integrity of the HVAC system. Using a genuine OEM seal strip guarantees the correct material properties and dimensions for effective sealing and long-term durability in the demanding HVAC environment.