Profile: Specialty Seal Group specializes in manufacturing hermetic seals. We offer ceramic-to-metal seals, glass-to-metal seals, nickel plating and conversion calculator. Our seals are vacuum-tight and offer the necessary resistance to heat, abrasion, chemicals, oil, grease & moisture. Our single & dual lead seals provide vacuum-tight insulated feed thru termination for heating elements or power cables and protects heating element from attack by oils, grease moisture & toxic fumes.