EVONIK CORPORATION › TEGO® FOAMEX 8030 TEGO® FOAMEX 8030 $0.00 TEGO® FOAMEX 8030 is a very effective defoamer emulsion based on polyether siloxane technology. Very suitable for medium to high PVC formulations. Add To Cart Added! TEGO® FOAMEX 8030 is a very effective defoamer emulsion based on polyether siloxane technology. Very suitable for medium to high PVC formulations. You Might Also Like TEGO® FOAMEX 840 TEGO® FOAMEX 812 TEGO® FOAMEX 805 N TEGO® FOAMEX 815 N AIRASE® 5500