Bergeon 4509 is high vacuum pressure waterproof watch case sealant.
- Will prevent leakage of moisture into the case due to worn-out joints or ill-fitting gaskets even when the watch is subjected to extremes of pressure variations.
- Will not evaporate, nor affect watch oils.
- Unaffected by temperatures changes.
- Will not run, harden or break down on the threads.
- Completely unaffected by moisture, salts acids, fungus alkali or sweat.