Glasswool That is a sound proofing material made from glass fibers. The main function of glasswool is to reduce the sound intensity of the resonance panel that reaches the ear (soundproofing) and its supporting function as a heat barrier. Soundproofing materials are generally soft and porous materials, such as foam and the like. Because, besides being very effective at reducing sound intensity, the material is also elastic. Glasswool which is known as an excellent heat and sound insulation material. This one product is easy to use and is elastic in nature, making it easy to install and can be adjusted to your needs.