Glasswool Namely a soundproofing material made from glass fibers. The main function of the glasswool is to reduce the sound intensity from the resonance of the panel to 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. Because, besides being very effective at reducing sound intensity, this material is also elastic. Glasswool is known as an excellent heat and sound insulation material. This one product is easy to use and is elastic, so it is easy to install and can be adjusted according to your needs.