Button Rubber

Absolute air tightness: Completely prevents the penetration of bacteria, moisture and air from the outside environment, prevents oxidation of pharmaceuticals inside.

Self-sealing ability: This is the most important feature. When using a needle to withdraw medicine, the rubber stopper will not be torn (created crumbs) and the needle hole will automatically shrink and seal as soon as the needle is pulled out.

Heat & Chemical Resistance: The button withstands high temperature sterilization processes (autoclaving) and does not react chemically with drug/vaccine ingredients.

High compatibility: Precise design to combine perfectly with standard aluminum caps and glass jars on the market.