Emulsifier & Oil Stain Remover. BIO MOUL EM is an excellent emulsifier of oils. It is safe to use on All kind of natural (Cotton, Linen, Wool, Silk, etc.) and synthetic, resin treated and fire proof garments. It is attracted to polyester fibers and form a coating on it. This coating leads shield the fibers from the soil (re- deposition) and dye particles. This is an important benefit in the light of polyester’s scavenger nature.