China Launches Production of Paint That Can Reduce Wall Temperatures by Up to 25°C
China has commenced large-scale production of a ‘super coating’ paint that can reduce the temperature of building walls by as much as 25 degrees Celsius during hot weather. Testing conducted over six months at a petrochemical plant in Hainan Province demonstrated that the new coating maintained surface temperatures 25 degrees Celsius lower than those with ordinary paint. This innovative paint works by reflecting solar heat and utilizing the principle of “radiative cooling,” requiring no electricity, water, or other cooling agents.
Citing China’s state media outlet Science and Technology Daily, the South China Morning Post reported that this paint effectively lowers surface temperatures without the use of any electrical or additional cooling resources. During the summer tests, surfaces coated with the new paint registered temperatures up to 25 degrees Celsius cooler compared to surfaces with conventional coatings. For example, on a day with an ambient temperature around 30 degrees Celsius, the temperature of tanks painted with the new coating was 25 degrees Celsius cooler than those with standard paint.
The temperature reduction is achieved through two processes. First, the coating reflects a significant portion of sunlight and heat, unlike traditional dark paints or conventional building materials which absorb solar heat. Second, it employs the radiative cooling principle, releasing absorbed heat as infrared radiation back into space. Conventional air conditioning systems consume electricity to cool building interiors, thereby increasing energy demand, costs, and carbon emissions.
China indicated that this coating is suitable for application in homes, offices, factories, warehouses, and public infrastructure. It is especially beneficial for metal tanks, warehouses, and factory walls, which often experience excessive heat. The report claims that the coating’s performance surpasses that of similar products worldwide. However, independent scientific testing, detailed technical specifications, and comparative studies across diverse climatic and building conditions remain limited in public disclosure.