Dynol 604 surfactant, an offering from Air Products, is a high-performance, ethoxylated nonionic superwetter (100% active liquid). Dynol 604 provides outstanding wetting and de-airentraining benefits for PCE superplasticiser admixtures. Typically recommended for use in air-entrained concrete applications. Works very well in combination with both synthetic and natural based airentrainers. Dynol 604 surfactant is a very powerful de-airentrainer which helps to avoid spiralling effects. An emulsifier might be needed to ensure long-term stability.