The Thermadrum insulating drum jacket maintains ready-mix quality in hot or cold weather, says the company. The result is more pour opportunities, extended delivery range without additives, reduced moisture loss in hot, low-humidity conditions and reduced requirements for temperature-control additives. Ready-mix concrete doesn't stick to the vinyl skin; no acid washing is needed. The jacket weighs 125 pounds and is custom-designed to fit mixer drums. Installation requires two people and takes less than an hour.