Jean-Louis David reveals 3 secrets for a blowout that lasts all summer
Every summer, the same story unfolds: a perfectly styled blowout in the morning, a limp, frizzy mess by the time you step outside. To tackle this all-too-familiar problem, Jean-Louis David shares three concrete secrets for keeping your hair looking flawless despite the heat and humidity.
Why summer destroys your blowout within minutes
Heat and humidity throw the scalp’s natural balance completely off-kilter. Shifting weather conditions can turn a polished blowout into an unruly mess in no time. But the heat from your hairdryer is already doing damage long before you even leave the house.
The moment a hairdryer’s temperature exceeds 150°C, supple keratin transforms into an extremely fragile version of itself. Sun exposure combined with high temperatures accelerates this breakdown, leaving the hair shaft porous and brittle. In response, the sebaceous glands go into overdrive, producing excess sebum that greases the roots while leaving the ends parched and dehydrated.
Another phenomenon makes things even worse: bubble hair syndrome. Blasting hot air onto strands that are still saturated with water causes the internal moisture to vaporise suddenly. Micro-bubbles form inside the hair shaft and burst, severing the fibre. This damaged hair becomes porous and can absorb up to 30% of its own weight in moisture, unravelling your blowout within minutes of stepping outside.
Jean-Louis David’s three tips for a blowout that holds
Hairdresser Jean-Louis David first recommends applying a multi-action heat-protection treatment. This product coats the hair fibre, prevents UV-induced dehydration, and primes the hair to resist ambient humidity. The right amount: a hazelnut-sized amount worked through the lengths, after shampooing and before drying.
Next comes the most unexpected secret: the cold-air finish. Ending the drying of each section with a powerful blast of cold air instantly seals the cuticles shut. This simple step locks in the shape and delivers an immediate boost of shine.
Finally, Jean-Louis David advises protecting hair mechanically. Loose braids or soft ponytails, not pulled too tight, are excellent options for shielding hair and your blowout from sun, wind, and friction. Wearing a hat or a scarf also protects the hair fibre from external aggressors. One last trick: spraying hairspray onto a comb before brushing deposits an ultra-fine, waterproofing protective film.
The practical steps to adopt right now
- Apply a hazelnut-sized amount of heat-protection treatment to the lengths before drying.
- Finish each section with a blast of cold air to seal the cuticles.
- Opt for loose braids or soft ponytails to protect your blowout.
- Wear a hat or scarf to shield the hair fibre from the elements.
- Spray hairspray onto a comb before brushing to create a waterproofing effect.
Which cuts deliver great results without a hairdryer
Some cuts are simply better suited to the demands of summer. A light, airy layered cut allows you to maintain maximum volume with minimal styling effort. These structures reduce bulk and encourage an aesthetically pleasing natural dry. All that’s left to do is smooth with cold air, just as Jean-Louis David recommends.
During heatwaves, the sleek low bun remains the most elegant solution. This style tames stubborn frizz while keeping the nape of the neck clear to help regulate body temperature. It is both practical and polished, the ideal choice when conditions are particularly unforgiving.
By following these recommendations from hairdresser Jean-Louis David, it is entirely possible to get through summer without sacrificing your style, whatever the weather throws at you.
