PROFESSIONAL EYELASH EXTENSION GLUE FOR QUALIFIED LASH TECHNICIANS ONLY Experience Level Advanced Strength Extremely Strong Drying time 1-2 seconds Room humidity 55-65% Room temperature 71.6-75.2°F Viscosity Thin A-02 eyelash extensions adhesive/lash glue: One of our best selling ...PROFESSIONAL EYELASH EXTENSION GLUE FOR QUALIFIED LASH TECHNICIANS ONLY Experience Level Advanced Strength Extremely Strong Drying time 1-2 seconds Room humidity 55-65% Room temperature 71.6-75.2°F Viscosity Thin A-02 eyelash extensions adhesive/lash glue: One of our best selling lash glues Extremely strong eyelash adhesive Works in humidity range: 55-65% Best eyelash extension glue for most humidity condition Suitable for classic lashes as well as russian lashes. Extremely fast-drying (1-2 sec) - NOT SUITABLE FOR BEGINNERS AND INTERMEDIATE lash technicians who performed less than 1000-1500 lash sets The glue for semi-permanent eyelash extensions is for professional use only.