A Kason door closer is designed to help your walk-in unit retain its cold air. Refrigerator door gaskets can slow down door closure and sometimes even prevent a walk-in door from completely closing, which wastes energy and presents a safety hazard if the refrigerator is left leaking cold air. Installing a spring or hydraulic refrigerator door closer is a super simple way to reduce energy waste and avoid accidentally air conditioning your hot kitchen with the air escaping from your walk-in.