Petrarch PS349.5 Silanol terminated polydimethyl siloxane United Chemical Technologies Silicone (Si) >> Silanol functional ADHESIVE >> Hot-melt >> Pressure sensitive (HMPSA) Because silicones are oxygen-permeable, flexible and have inert properties they are used in numerous medical devices. Industrial silicone applications are typically coupling agents for bonding elastomers to polar substrates, adhesive systems and silicone lubricants. Silanol terminated polydimethyl siloxane Forms the matrix component in tackifiers and pressure sensitive adhesives. Silanol terminated polydimethyl siloxane. Possesses high viscosity. Forms the matrix component in tackifiers and pressure sensitive adhesives.