Factory Direct Rockwool insulation material is felt straws large favorably rockwool has good insulation properties, and low prices, our products are made of high quality raw materials processing, quality assurance, won the majority of enterprises love. Flame retardant is as antifreeze, which uses rice straw as raw material, processed into straws, and then soaked and fermented liquid flame from 4-5 days, the overall external flame-retardant non-woven trap. Retardant performance is good, can recycling, is flame frost winter construction projects preferred. I plant mainly produces 170 × 90 (cm) ,3-4 kilograms of flame retardant antifreeze rockwool. I plant products in May 2011 through the National Building Materials Inspection Center --- for qualified products! Flame retardant reach B2 level. Builders winter construction is the preferred insulation antifreeze need to contact 15101059046,13552566189, qq 625266624