Vanity Life Eyelash Extension Glue works for classic and volume application. This is a black eyelash adhesive that is perfect for experienced technicians with an incredible FAST DRYING TIME of 1-2 seconds and EXTRA LONG RETENTION period of 6-7 weeks. LONGEST RETENTION PERIOD of any semi permanent individual eyelash extension glue on the market, lasting up to 6-7 weeks! Treat your clients by using the absolute best glue while maintaining an ultra natural look. No more complaints that lashes are falling out too soon after eyelash application. LATEX & FORMALDEHYDE FREE.