EVONIK CORPORATION › TEGO® FOAMEX 800 TEGO® FOAMEX 800 $0.00 TEGO® FOAMEX 800 is a very compatible defoamer emulsion based on polyether siloxane technology. Very easy to incorporate. Quantity: Add To Cart Added! TEGO® FOAMEX 800 is a very compatible defoamer emulsion based on polyether siloxane technology. Very easy to incorporate. You Might Also Like TEGO® FOAMEX 810 TEGO® FOAMEX 815 N TEGO® FOAMEX 840 TEGO® FOAMEX 845 TEGO® FOAMEX 7447