... wool composed of man-made vitreous silicate fibers. “Superwool” fiber is exonerated from the carcinogen classification in the ... to act as an alternative to RCF. The “Superwool” fiber textiles offer a versatile alternative to traditional insulation ... used to replace RCF and asbestos applications; Typical applications of Superwool fiber cloth include: expansion joints, safety blankets, curtains, ...