Isopad IT-KDL heating cables are specifically designed for internal and external heating of refrigeration drainlines and freezer doors. KDLs are manufactured from silicone rubber, making them water resistant, and are supplied factory terminated in standard lengths. IT-KDL-SRs are specially produced in a small round form, making them very flexible and ideal for small bore drainlines. Flexible SL and SR versions are standard; SLS and SRS variants are manufactured with a steel braid.