PROFESSIONAL EYELASH EXTENSION GLUE FOR QUALIFIED LASH TECHNICIANS ONLY Experience Level Advanced Strength  Extremely Strong Drying time 0.5-1 second Room humidity 50-70% Room temperature 18-25°C (64.4°F - 77°F)  Viscosity  thin, medium, syrup like syrup like   Ultra Bond lash adhesive / lash glue: Best eyelash extension glue for the low humidity conditions.  Suitable for classic lashes as well as russian lashes. The velvety consistency allows you to pick the ideal amount of glue Glue stays flexible even when it's completely polymerized, giving a great retention Extremely fast-drying (0.5-1 sec) Retention: 6-8 Weeks/opened, 8 Months/unopened HOW TO USE:     Shaken side to side NOT up and down     Shake before each use     Shake for 20 seconds to ensure ingredients are well mixed     If the glue is not well shaken will result in retention issues     Changed every 20-30 minutes and a new drop dispensed into a new glue ring or on a new area on a jade stone or crystal stone     Never dispense adhesive on top of the previous drop   Adhesive Contains NO LATEX and NO FORMALDEHYDE