Lash Bond & Seal 2 In 1: Double head tube with lash bond and seal is designed for clusters lash lover. The combination of these two products can make the retention time of lash clusters up to 2-3 days. | Black Lash Glue: Drying time of this cluster lash glue is 30-40s. You need to wait for the water in the eyalash glue to evaporate, and then the stickness of the glue will appear. Do not blink during the waiting process to avoid eyelash glue sticking to eyelids. | Clear Lash Seal: The sealant will form a film 40s after application. This film can isolate oil and dust to extend lashting time up to 2-3 days. Use bristle brush to reach each lash and then use the ball at the front to reinforce the base of cluster lashes. | Waterproof: Our bond and seal lash glue is waterproof and the individual lashes will not fall out when washing face in the morning and evening. Lash seal is more effective at protecting your eyelashes. | No Irritation: Lash cluster glue and sealant are 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.