In this video, we'll review how we insulate polyethylene chemical storage tanks at Poly Processing. The insulation maintains the temperature of the chemical being stored. We apply two inches of insulation and a coating of industrial grade latex paint as well as heating pads of various T-levels and a redundant thermostat controller box. As with all chemical storage considerations, it's important to start with the chemical you're storing. Factor in the lowest temperature you'd experience in the storage environment to determine the Delta T required.