Vector 4230 Styrenic block copolymer Dexco Polymers Styrene block copolymer (SBC) >> Styrene isoprene rubber, SIS SEALANT ADHESIVE Vector styrenic block copolymer available for adhesives and sealants applications. Vector styrenic block copolymer - tailored product with excellent purity and consistency as well as high performance properties. This copolymer can be combined with hydrocarbon resins as an ideal choice for many adhesive applications such as PSA ( pressure sensitive adhesives) tapes and labels and disposables. SI(n) copolymer. Used for adhesives and sealants applications. Offers good purity and consistency, and high performance properties. Can be combined with hydrocarbon resins for many adhesive applications (PSA).