SS OMS 391 is a non-hydrolytic copolymer of polysiloxane and polyether, developed to impart an excellent emulsifying ability, nucleation ability and foam stabilizing effect. It may be used as a formulation ingredient and is suitable for polyurethane foaming system with different blowing agent.

Parameters Value
Appearance Clear to pale yellow colored liquid
Viscosity @ 25°C 500 – 1000 cst.
Flash Point (by open cup) > 100 °C
Refractive Index 1.44 --1.46

Typical Values – Should not be considered as specifications.


  • Excellent foam stability plus good breathability in low-density formulations blown with different blowing agent.
  • Acts as a good emulsifier
  • Lowers surface tension
  • Excellent foam builder
  • Non Ionic


SS OMS 391 should be used 0.05 to 0.95 percent of total formulation required.
Note :Changes may occur from system to system as methods of use and conditions of applications are beyond our control, hence users are requested to evaluate the product before actual application.
This product is neither tested nor represented as suitable for medical or pharmaceutical uses


Store the original container in a cool and dry place. Shelf life in the original unopened containers, when stored at or below 25C, is 2 years


Product safety information required for safe use is not included. Before handling, read Material Safety Data Sheets (MSDS) and container labels for safe use, physical and health hazard information.