Humidity and Temperature - this glue gets the job done even in low humidity, 10-15% and up; temperature 23 is ideal.
Drying time 1-2 seconds. Important tip - prior to application, isolate BEFORE you collect the glue with the fan/lash. Even if you isolate in the speed of light it is still time that your adhesive already started crystallising while you are holding your fan with adhesive on it, will it still stick? Yes. Will it last at its best? No.
Shake your bottle very well every time you are about to squeeze a new drop as ingredients tend to separate when the product is standing still for a while.
Shelf life after opening the bottle - 4 weeks. Date your bottle if you need to- ANY fast-drying adhesive will only stay fresh up to 4 weeks, all of them. So even if your bottle is half full and it has been 4 weeks- let it go. It's easier to keep your adhesive fresh than "relash" clients that calling you 3 days after you did their lashes, complaining they are falling off- not worth your time.
Do not keep this adhesive in the fridge. Just keep away from direct light. DO NOT put it in a jar with rice- it only works for glues with regular drying time (3-6 sec), it will dry up your glue.
Retention- with proper application lashes will only shed during the natural shedding cycle.
Allergies- People may be allergic to any adhesive (majority to carbon), methyl allergy is possible as well, therefore suitable for people with carbon sensitivity.
Always have 2 bottles available. One to use, another as a backup- there's nothing sillier than running out of adhesive when you are lashing for a living. Keep away from direct light for up to 4 months.