-Steel Drum - EO/PO Block Copolymer, Butyl Based, 100% Active. - Pluriol WSB 125 is a water-soluble surfactant. This surfactant was designed to prepare O/W emulsions of many hydrophobic materials. - Pluriol WSB 125 is a highly effective emulsifier, stabilizer compatibilizer and dispersing agent. It is typically used at a concentration of 5 – 10% w/w based on % solids in the formulation. Pluriol WSB 125 is 100% active, VOC free and compatible with other surfactants, including anionic surfactants. Pluriol WSB 125 is used for the following formulation types: emulsifier concentrates, emulsions (oil and water), microemulsions, suspension concentrates, suspo-emulsions, soluble liquids and wettable powders.