Unopened glue period of six months. Two months after opening the bottle. The best storage temperature is 4-20 degree celsius, The best storage humidity is 45%-75% RH. The best operating temperature is 23-26 degrees celsius. Store in a cool, dry place or in a refridgerator. Shake for 5 minutes before use. Keep the glue caps super tight between uses. 
For professional use only for eyelash extension. It is best not to use the first drop of glue.