Sealing material and method

A sealing tape consisting essentially of a low temperature glass, a mill addition that lowers the effective coefficient of thermal expansion of the glass in a seal and a high melting organic medium that is a solid at room temperature, that melts at an elevated temperature, that boils below 350.degree. C. and that is selected from the group consisting of primary alcohols with a primary carbon chain of 14-20 carbon atoms, corresponding fatty acids with a carbon chain of 10-18 carbon atoms, benzoate esters of polyols and mixtures.

A method of preparing a sealing tape consisting essentially of a low temperature glass, a mill addition that lowers the effective coefficient of thermal expansion of the glass in a seal and a medium, the method comprising selecting as a medium a high melting organic medium that is a solid at room temperature, that melts at an elevated temperature and that boils below 350.degree. C., and that is selected from the group consisting of primary alcohols with a primary carbon chain of 14-20 carbon atoms, corresponding fatty acids with a carbon chain of 10-18 carbon atoms, benzoate esters of polyols and mixtures, reducing the solids to powder form, thermally liquefying the organic medium, hot mixing the powdered solids in the liquid organic medium to form a dispersion and casting the dispersion while hot onto a cold surface to immediately solidify the organic medium.