Thomas TS2-2158-H Lubriseal Stopcock Grease, 75g Tube Lubriseal stopcock grease For lubricating ground glass joints, glass and metal stopcocks and valves, and for sealing desiccators, anaerobic culture jars and similar utensils Lubriseal has a low vapor pressure and resists attack by acidic and alkaline solutions Lubriseal is smooth-textured, stable, free from vegetable or animal oil or silicone and practically insoluble in water for use in high vacuum systems