PEL-ROK 31R1 is an effective low-foam, nonionic wetting agent. It is useful as a rinse aid for auto dish washing and as an industrial wetting agent. It is a nonionic block copolymer surfactant with terminal secondary hydroxyl groups. The average molecular weight of this product is 3250 Daltons and it consists of approximately 15% ethylene oxide and 85% propylene oxide. PEL-ROK 31R1 is low foaming as compared with other nonionic surfactants.