Thomas TS2-2158-H Lubriseal Stopcock Grease, 75g Tube
Its mobility in film-like quantities makes it excellent not only for lubricating, but for preventing the freezing of stopcocks, ground joints, etc., which are stored for long periods of time; also recommended for use in high vacuum systems, Melting point approximately 52 degree C . ASTM penetration (D 937) unworked, 150 units with 150 gram grease cone at 25 degree C.