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 TEGO® FOAMEX 8030 TEGO® FOAMEX 815 N TEGO® FOAMEX 840 AIRASE® 5500 TEGO® FOAMEX 842