Stag Wellseal Jointing Compound Tube 100ml. Commonly used to seal aluminum cylinder heads and transmission boxes. Used to seal threaded connections as well as flat-faced joints and can be used with or without a gasket, depending upon the design of the assembly. It is highly resistant to the majority of commonly used field, lubricants and coolants and is non-corrosive and free from abrasive fillers. Dimensions 8.00cm x 4.10cm x 4.10cm, Weight 0.12kg. An automotive jointing compound formulated to give the best possible sealing performance under a wide variety of conditions.