Cyanoacrylate is responsible for adhesive performance of eyelash extensions glue, so its amount in the glue directly influences setting and wearing times. Cyanoacrylate, or rather its fumes, is also what causes allergic reactions. Reducing the amount of cyanoacrylate in the glue reduces the setting time to 8 or more seconds and wear time typically doesn't exceed 2 weeks. If you see a fast, hypoallergenic glue it's most likely a marketing trick.
To determine client's potential cyanoacrylate reaction a patch test is done 1-3 days prior to the estimated procedure date. A couple of artificial lashes (same length as the natural once so you can't see the difference) are applied on one eye. Reaction will happen during first 24 hours. Under no circumstances should the glue be applied to the skin!
How can a lash artist assure their safety when working with glues?
1. Glue usage Always place your glue surface as far away from your face as possible. Under no circumstances use the glue ring! If you do, you'll keep putting the glue right next to your face and raspatory organs.
2. Protective masks Unfortunately, most filter masks (including the ones with carbon canisters) don't protect us from the glue fumes. The easiest and most convenient way is to use a wet mask because moisture is what polymerizes glue fumes and prevents them from getting into our airways.
3. Organizing your workplace Ideally, a range hood that will draw the air out along with the adhesive fumes should be installed above the workplace.