This document specifies requirements for chemical and physical properties, and minimum performance requirements of medium expansion foams suitable for surface application to water-immiscible liquids. Requirements are also given for marking. WARNING - Any type approval according to this document is invalidated by any change in composition of the approved product. NOTE 1 Some concentrates conforming to this document can also conform to other parts of the EN 1568 series and therefore can also be suitable for application as low and/or high expansion foams. NOTE 2 For national deviations, see Annex R.