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 815 N TEGO® FOAMEX N TEGO® FOAMEX 805 N AIRASE® 5355 TEGO® FOAMEX 840