Neicha Elite+ silk eyelash adhesive - designed for professional use and can be used for eyelashes between 2D/9D. The drying time of the adhesive after silk eyelash application is 0.5 seconds. Once opened, it has a shelf life of up to 6-7 weeks - it should be stored in the refrigerator. Silk eyelash application where adhesive will be used should be done at a temperature of 18-25°C and 50/60% humidity. Neicha ELite+ silk eyelash adhesive does not contain formaldehyde and does not cause sensitivity or allergies. It should be shaken before use - keep away from sunlight and children.