Gravex 915 Naphthenic based oil Shell Chemicals Oils (Process / Natural) >> Naphtenic Chloroprene Rubber (CR) Rubber - Elastomer (Chloroprene, Butyl …) Styrene block copolymers, SBC (SBS, SIS, SEBS...) Styrene copolymers Natural rubber (NR) SEALANT ADHESIVE Gravex oil naphthenic based oil Processing oil Used in elastic and self-adhesive joint sealings. Naphthenic process oil. Used in elastic and self-adhesive joint sealings. Offers compatibility with polychloroprene, SIS, SBR, NR, BR, IR and NBR.