... thermal shock Double Bubble Insulation materialAL/Bubble+Bubble/AL without fireproofcolor: silver Characteristics: 1.No odor and toxicity, ... insulation, sound insulation, anti-radiation, anti-vibration, and shielding; 4.Moisture barrier, sun-proof, waterproof, ... of air conditioner and water heater; 3. Protective coatings of water pipe and ventilating pipe; Double Bubble Insulation material