mineral wool insulation board price fireproof waterproof rock wool insulation 

Rock wool board is made of select fine basalt as the major materials which is pulled into 4-7um non-continuous fibers after melted by adopting advacned international four-roller centrifugal cotton-making procedures and adding a certain of adhesives, dust laying oil and water repellent into rock wool fibers. It can be made into products series with different density according to various uses through the technology of sedirmentation,solidfy,cutting and etc.