Flavex 921 Paraffinic based oil Shell Chemicals Oils (Process / Natural) >> Synthetic paraffinic Styrene block copolymers, SBC (SBS, SIS, SEBS...) Styrene copolymers ADHESIVE Flavex Paraffinic process oils Relatively naphtenic oil type Used in adhesives Offers high aromatic content. Relatively naphthenic oil type, paraffinic process oil. Used in adhesives. Offers high aromatic content and good solvency.