One to two drops directly on the aluminum threads of the LAVATUBE will ensure the buttery smooth threads to reduce wear. Made in the USA. This is for the battery case threads ONLY; not the 510 connection where you connect your tank.
If you've got the LavaTube, you MUST get a tube of Noalox. One tube will last you a lifetime.... a little dab'll do ya! Rub it into the threads of the battery tube, smear it all around so it gets into the grooves, then wipe it off. Protects the threads from wear, and your tube screws together so smoothly. Really great stuff!