Distributor Rockwool Surabaya We provide rockwool, which is a lightweight mineral fiber made from rock base material, which is designed as a sound-absorbing material, insulating against heat, and can also be used as a hydroponic growing medium. This one material is one type of construction material that can be said to be multifunctional. If you want to provide insulation in a residential or commercial building, to protect pipes, boats, it can also be used to make a studio wall cladding.