U.S. SEALUBE is a water based formula specifically designed to lubricate rubber, making the installation of mechanical seals fast and easy. U.S. SEALUBE maintains its wetness for a short period of time. Unlike PTFE or silicone based lubricants which penetrate the elastomer and never allow the elastomer to grip the shaft or bore, U.S. SEALUBE evaporates. Once the evaporation takes place, the component is dry to the touch. The lubricity is gone and will not return, even in the presence of moisture. Your seal is now locked in place. U.S. SEALUBE has a shelf life of about 1 year if stored properly. U.S. SEALUBE should be stored in a cool dry place away from direct sunlight.