Glasswool is a type of thermal insulation that has the same function as rockwool. The difference is this product is made of glass fiber. Its main function is to reduce sound and heat for various needs, such as rooms, boilers and pipes.
This insulation material is processed in a certain way so that it has a texture like wool / fleece. Glasswool is still widely used because it is an excellent insulation / heat absorber and sound absorber.