Agitan 770 Polysiloxane Ultra additives Defoamers / Anti-Foaming Agents ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) Agitan 770 Defoamer Polysiloxane Slightly emulsifiable Used in pressure sensitive, laminating and packaging adhesives. Slightly emulsifiable polysiloxane. Used as a defoamer in pressure sensitive, laminating and packaging adhesives.