30-40s Drying Time: You need to wait 40s for the water in the eyalash glue to evaporate after application, and then the stickness of the glue will appear. | Black Lash Glue: Brush black eyelash glue on natural lashes and it is strong hold for 2-3 days. Do not blink during the waiting process to avoid eyelash glue sticking to eyelids. | Clear Lash Glue: Brush clear lash bond on base of cluster lashes and waiting for 40s until the glue becomes transparent. Then you can apply cluster lashes under natural lashes and fix it. | Waterproof: Our cluster lash glue is waterproof and the individual lashes will not fall out when washing face in the morning and evening. It is recommended to use with lash seal which is effective to extend the lasting time. | No Irritation: Lash cluster glue is safe for sensitive skin. You can start your beauty eyes journey with confidence. Clean and curl natural lashes before application can make them fit better with lash clusters.