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. 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 AIRASE® 8070 TEGO® FOAMEX 822 TEGO® FOAMEX 845 TEGO® FOAMEX 842 TEGO® FOAMEX 812