DMS V31S15 Vinyl terminated polydimethylsiloxane, fumed silica reinforced 68083-19-2 Gelest Polymer intermediates SEALANT Vinyl terminated polydimethylsiloxane, fumed silica reinforced. Used as intermediate in RTV silicone. Vinyl terminated polydimethylsiloxane, fumed silica reinforced. Used as intermediate in RTV silicone.