Once upon a time in the lash world, it was gospel to tell your clients to wait 24 (sometimes even 48) hours before getting their lashes wet. But thanks to major upgrades in adhesive technology, that rule might be on its way out.
So what's the truth? Let’s break it down.
The Science Behind Lash Adhesives
The key player in lash adhesive is cyanoacrylate. This ingredient cures when it comes into contact with moisture in the air through a process called polymerization. Products like lash misters and super bonders can help speed this along.
Older adhesives used less advanced forms of cyanoacrylate that weren’t great at absorbing moisture quickly. That meant the curing process took a lot longer, leaving the glue semi-liquid and vulnerable. If lashes got wet too soon, the bond could break, leading to premature shedding.
Today’s adhesives, though, are a whole new game. They’re packed with more flexible, lower-fume versions of cyanoacrylate that cure fast, resist heat better, and hold up longer.
So, Does Waiting 24 Hours Do Anything?
With modern adhesives, about 90% of the curing happens within the first 10 minutes. But complete bonding still takes around 24 hours.
What does that mean for your clients? If they get their lashes wet shortly after their appointment, it likely won’t ruin retention. Waiting still offers a tiny edge in bond strength, but for most clients, it won’t make a noticeable difference.
Should I Tell My Clients to Wait?
That’s your call. But here’s our take:
Instead of obsessing over the 24-hour rule, focus on the aftercare steps that matter more. Things like:
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Don’t rub, tug, or pull lashes
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Cleanse daily with a lash extension friendly cleanser
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Avoid steam, saunas, and direct heat (especially on day one)
These habits will do far more for retention than simply avoiding water.
Thanks to smarter, faster-curing adhesives, the 24-hour no-water rule isn’t what it used to be. It’s okay to relax a little. Educate your clients on what really matters for lash retention, and you’ll help them keep those extensions full and fabulous for longer.
