Polysiloxanes have been used as abrasion resistant coatings on such items as contact lenses and airplane windows, made from polycarbonates and acrylates, but do not appear to have been used as thermal or moisture barriers, or on plastics such as polyesters like PET and PEN. [0024] The typical polysiloxane reactions involving hydrolytic silanol condensation are, Si???OR+H2O Si???OH+ROH Si???OH+HO??