Epres is a new spray-on bond repair treatment built by Eric Pressly, the material scientist credited with helping invent the bond-building category in the first place at Olaplex. Its patented, acid-free formula uses Biodiffusion technology to keep repairing hair for hours after application, targeting chemical, thermal and mechanical damage in a single at-home step. Here's what makes it different, and how to actually use it.
By Astin, Trichologist in Training, Hairhouse
Who Is Behind Epres, and Why Does That Matter?
Bond repair as a haircare category barely existed a decade ago, and Eric Pressly, PhD, is one of the scientists credited with creating it. After helping develop the original bond-building technology that made Olaplex a household name, Pressly founded Epres to take the science further, built around a newer delivery method called Biodiffusion rather than repeating the same formula under a different label.
That lineage matters because bond repair claims are everywhere now, and it's genuinely hard to tell which ones are backed by real formulation science versus marketing that borrows the language. Epres being founded by someone who helped build the original category, rather than someone entering it after the fact, is a meaningfully different starting point.
How Is Epres Different From Other Bond-Building Treatments?
Most bond-building treatments work at the moment of application and stop there. Epres is built around Biodiffusion technology, designed to continue diffusing repair through the hair shaft for hours after it's applied, rather than finishing its job the second it's rinsed or dried out. The formula itself is also unusually simple: a highly concentrated, waterless treatment made from just four vegan, biodegradable ingredients, with no acids in the mix.
Expert Tip: Hairhouse stylists recommend applying the Bond Repair Treatment to towel-dried, not soaking wet, hair for the best absorption, and using it consistently once or twice a week rather than only after a damaging chemical service, since regular use is what builds the cumulative repair the Biodiffusion technology is designed around.
Which Epres Product Do You Actually Need?
For most people dealing with damage from colour, heat styling or regular mechanical stress like brushing and heat tools, the epres Bond Repair Treatment Kit is the place to start, an atomiser plus two 15ml treatments designed to deliver deep, long-lasting repair in a single spray-on step.
Once you've worked through the starter kit, the epres Bond Repair Treatment Refill restocks the same formula without needing to buy a new atomiser, making ongoing use more cost-effective if the treatment has become a regular part of your routine.
To round out the routine on wash days, the epres Healthy Hair Shampoo and epres Healthy Hair Conditioner are formulated to cleanse and condition without undoing the bond repair work, suited to all hair types and textures rather than one specific concern.
How Do You Actually Use Epres at Home?
Apply the Bond Repair Treatment to towel-dried hair one to two times a week, focusing on mid-lengths and ends where damage tends to concentrate rather than the scalp. It's designed to be left on rather than rinsed out immediately, which is part of how the Biodiffusion technology continues working over the following hours. Use the Healthy Hair Shampoo and Conditioner on your regular wash days, and treat the Bond Repair step as an addition to your routine rather than a replacement for conditioner, since the two are doing different jobs.
Frequently Asked Questions
What makes Epres different from Olaplex?
Epres was founded by Eric Pressly, one of the scientists behind the original bond-building technology used at Olaplex, but it's built around a different delivery method called Biodiffusion, designed to keep diffusing repair through the hair for hours after application rather than working only at the moment it's applied.
Is Epres suitable for all hair types?
Yes. The Bond Repair Treatment and Healthy Hair Shampoo and Conditioner are formulated for all hair types and textures, and the treatment specifically targets chemical, thermal and mechanical damage rather than one hair type in particular.
How often should you use the Epres Bond Repair Treatment?
One to two times a week is the general guide, applied to towel-dried hair. Consistent use matters more than occasional use, since the Biodiffusion technology is designed to build cumulative repair over time rather than fix damage in a single application.
Is Epres vegan and acid-free?
Yes. The Bond Repair Treatment is a waterless, highly concentrated formula made from just four vegan, biodegradable ingredients, and it doesn't rely on acids to do its repair work, unlike some other bond-building formulas on the market.
Do you need to use the Epres shampoo and conditioner with the treatment?
No, but they're designed to work alongside it without undoing the repair. The Bond Repair Treatment can be used with your existing shampoo and conditioner if you'd rather introduce it as a standalone step first.
New to bond repair or ready to try it from the source? Shop the full epres range at Hairhouse, available online and in Hairhouse stores nationwide, with free standard delivery on orders over $70.