Glasswool That is a soundproofing material made from glass fibers. The main function of the glasswool is to reduce the sound intensity of the panel resonance reaching the ears (soundproofing) and its supporting function as a heat barrier. Sound absorbing materials are generally soft and porous materials, such as foam and the like. The use of glasswool is said to be able to maintain indoor air temperature and can avoid air temperatures that are too cold or too hot. One of the uses of glasswool is to reduce heat. By using a glasswool, you can save more electricity because you can minimize the use of air conditioners or fans.