Rock wool panels are special stuff made from natural rocks and some minerals. They use it alot in building works for different reasons. GLOSTAR company produce custom size rock wool panels. So they can make panels that fit exactly where you want, this make them very helpful for builders and architects. The way they make rock wool is melt the rocks in very high temprature then spin into fibers. After compress these fibers, it become strong stainless steel surface rock wool panel 304 grade good for insulation and also sound proofing.