Humidity, chlorine, salt water, sun exposure — summer is hard on hair, even hair that looks fine the other nine months of the year. If your blowout isn't lasting, your color is looking dull, or your ends feel more like straw than silk by August, a single treatment can make a bigger difference than switching your whole haircare routine. That's exactly what Kérastase Fusio-Dose is built for.
What Is Fusio-Dose?
Fusio-Dose is an in-salon treatment from Kérastase built around personalization rather than a one-size-fits-all formula. Instead of picking a single product off a shelf, your stylist mixes two components in the moment:
- A Concentré, which targets your primary hair concern — things like dryness, damage, color fade, or lack of density
- A Booster, which addresses a secondary concern — shine, frizz control, reinforcement, or color protection
With multiple Concentrés and Boosters available, there are dozens of possible combinations, which means the treatment your stylist mixes for you is based on a real diagnosis of your hair that day, not a generic "summer hair mask." The whole thing typically takes just a few minutes once your stylist has identified what your hair needs.
At Blushington, Fusio-Dose is available as an add-on to any blowout — no separate appointment needed. Clients who add it on can see up to 95% less breakage, 70% more shine, and 24 hours of anti-frizz protection.
Why It's Especially Useful in Summer
A few specific summer stressors make Fusio-Dose worth adding to your routine this time of year:
Humidity and frizz. Sweat and moisture in the air disrupt the hair's outer layer, which is what causes frizz and flyaways. A frizz-focused Booster helps smooth that layer back down, so a blowout has a better shot at surviving a humid commute or an outdoor event.
Sun and color fade. UV exposure breaks down hair color over time, especially on blonde or color-treated hair. A color-protecting Concentré is designed to help preserve vibrancy and tone between salon color visits.
Chlorine and salt water. Pool and ocean days are tough on hair, stripping moisture and leaving strands feeling rough. A hydrating or reconstructing combination can help offset that damage before it compounds over a summer of pool days.
Heat styling fatigue. Between humidity-driven frizz and extra blowouts to combat it, hair often sees more heat styling in summer, not less. A reinforcing Booster helps support the hair fiber against that added stress.
What to Expect During Your Appointment
Fusio-Dose is designed to be added onto an existing service, not a separate long appointment. During your visit, your stylist will:
- Assess your hair's current condition and ask about your main concerns
- Select a Concentré and Booster combination suited to those concerns
- Apply the mixed treatment, which typically processes for just a few minutes
- Finish with your regular blowout or styling service
Because the diagnosis happens in person, it's worth mentioning anything specific you're dealing with — post-vacation dryness, upcoming events you want your color to look fresh for, or hair that's felt more unmanageable than usual since the weather turned.
Is Fusio-Dose Right for Every Hair Type?
Yes — that's part of the point. Because the Concentré and Booster are chosen based on your individual hair, not a fixed formula, it can be tailored for color-treated hair, curly and textured hair, fine hair that needs volume without weight, or damaged hair that needs reinforcement. The combination changes; the process doesn't.
Humidity, chlorine, salt water, sun exposure — summer is hard on hair, even hair that looks fine the other nine months of the year. If your blowout isn't lasting, your color is looking dull, or your ends feel more like straw than silk by August, a single treatment can make a bigger difference than switching your whole haircare routine. That's exactly what Kérastase Fusio-Dose is built for.
What Is Fusio-Dose?
Fusio-Dose is an in-salon treatment from Kérastase built around personalization rather than a one-size-fits-all formula. Instead of picking a single product off a shelf, your stylist mixes two components in the moment:
- A Concentré, which targets your primary hair concern — things like dryness, damage, color fade, or lack of density
- A Booster, which addresses a secondary concern — shine, frizz control, reinforcement, or color protection
With multiple Concentrés and Boosters available, there are dozens of possible combinations, which means the treatment your stylist mixes for you is based on a real diagnosis of your hair that day, not a generic "summer hair mask." The whole thing typically takes just a few minutes once your stylist has identified what your hair needs.
At Blushington, Fusio-Dose is available as an add-on to any blowout — no separate appointment needed. Clients who add it on can see up to 95% less breakage, 70% more shine, and 24 hours of anti-frizz protection.
Why It's Especially Useful in Summer
A few specific summer stressors make Fusio-Dose worth adding to your routine this time of year:
Humidity and frizz. Sweat and moisture in the air disrupt the hair's outer layer, which is what causes frizz and flyaways. A frizz-focused Booster helps smooth that layer back down, so a blowout has a better shot at surviving a humid commute or an outdoor event.
Sun and color fade. UV exposure breaks down hair color over time, especially on blonde or color-treated hair. A color-protecting Concentré is designed to help preserve vibrancy and tone between salon color visits.
Chlorine and salt water. Pool and ocean days are tough on hair, stripping moisture and leaving strands feeling rough. A hydrating or reconstructing combination can help offset that damage before it compounds over a summer of pool days.
Heat styling fatigue. Between humidity-driven frizz and extra blowouts to combat it, hair often sees more heat styling in summer, not less. A reinforcing Booster helps support the hair fiber against that added stress.
What to Expect During Your Appointment
Fusio-Dose is designed to be added onto an existing service, not a separate long appointment. During your visit, your stylist will:
- Assess your hair's current condition and ask about your main concerns
- Select a Concentré and Booster combination suited to those concerns
- Apply the mixed treatment, which typically processes for just a few minutes
- Finish with your regular blowout or styling service
Because the diagnosis happens in person, it's worth mentioning anything specific you're dealing with — post-vacation dryness, upcoming events you want your color to look fresh for, or hair that's felt more unmanageable than usual since the weather turned.
Is Fusio-Dose Right for Every Hair Type?
Yes — that's part of the point. Because the Concentré and Booster are chosen based on your individual hair, not a fixed formula, it can be tailored for color-treated hair, curly and textured hair, fine hair that needs volume without weight, or damaged hair that needs reinforcement. The combination changes; the process doesn't.
Frequently Asked Questions
Is Fusio-Dose available as an add-on to a blowout? Yes — at Blushington, Fusio-Dose can be added onto any blowout, so there's no need to book a separate appointment.
How long does a Fusio-Dose treatment take? The treatment itself typically takes just a few minutes once your stylist selects the right combination, making it easy to add onto an existing appointment.
Will Fusio-Dose help with frizz in humid weather? Frizz-focused Booster combinations are specifically designed to smooth the hair's outer layer, which is one of the main contributors to humidity-driven frizz.
Can Fusio-Dose help protect color-treated hair over the summer? Color-protecting Concentré options are designed to help preserve vibrancy and tone, which is especially useful during a season of extra sun exposure.