PDS 1615 Silanol terminated diphenylsiloxane-dimethylsiloxane copolymer 68083-14-7 Gelest Silicone (Si) >> Silanol functional SEALANT ADHESIVE Silanol terminated diphenylsiloxane-dimethylsiloxane copolymer. Offers special thermal and optical properties. Silanol terminated diphenylsiloxane-dimethylsiloxane copolymer. Offers special thermal and optical properties.