Keratin Spray: How to Repair Hair After Summer
Open-air pool, swimming lake, sun from morning till night – summer was fantastic, but your hair tells a different story: a strawy feel, dull shine, rough ends. This is exactly where a keratin spray comes in: liquid keratin wraps around every single hair as a leave-in treatment, visibly smooths the roughened surface and makes stressed hair supple and easy to comb again. In this guide you'll learn what the spray can really do – and what it can't – how to apply the two-phase conditioner step by step and whether Keratin or Milk Therapy suits your hair better.
Sun, chlorine and salt: what summer leaves behind in your hair
Three summer classics wear down your hair, each in its own way: UV radiation attacks the protein structure and the protective lipids, chlorinated water strips the natural protective film from the hair surface, and salt water pulls moisture out of the hair as it dries. The result is always the same: the cuticle – the outermost layer of the hair – no longer lies flat but stands up. Raised cuticle scales reflect light diffusely instead of evenly (dull instead of glossy), snag on each other when you comb, and make the hair look brittle and prone to split ends.
How to keep this kind of damage to a minimum while you're still swimming is covered in Part 1 of this series: caring for hair after chlorine and salt water. This article is the follow-up for everyone whose swimming season has already left its mark – now it's about repairing your hair after summer. More precisely: repairing it cosmetically, and that distinction matters.
Liquid keratin: what a keratin spray can do – and what it can't
Keratin is the protein your hair is largely made of. In the spray it comes in liquid form: it settles on the roughened, stressed spots of the hair surface, cosmetically fills structural gaps and lays the cuticle visibly smoother. Your hair feels softer right away, shines again and combs through without tugging – even when wet, the state in which it's most vulnerable. Because less snags, less breaks off during combing and styling.
Just as important is managing expectations: hair is dead material. Once damage has occurred it can't be undone – only healthy hair grows back. The effect is an immediate cosmetic one on the hair surface that fades with each wash and therefore needs refreshing on a regular basis. The spray is not a substitute for the scissors on badly split ends or for a salon treatment. In return, it's applied in 30 seconds – whenever you like, without an appointment.
How to use Two Phase Conditioner Keratin: step by step
The Two Phase Conditioner Keratin is a leave-in: the bottle holds two separate phases that are only mixed right before use – hence the name. Here's how to apply the keratin spray correctly:
- Shake vigorously, until both phases have fully combined. Only the mixture is the finished treatment – don't spray while the layers are still settling.
- Wash your hair and towel-dry it. In dripping-wet hair the treatment gets diluted and runs off; towel-dry hair absorbs it best.
- Spray into the lengths and ends, skipping the roots. At the roots the hair is youngest and needs no extra care, which would only weigh it down.
- Don't rinse out. Briefly work it in or comb it through, then dry and style as usual.
- Repeat two to three times a week – with heavily stressed hair, after every wash.
This doesn't just apply to long manes: if you keep short hair and wear wax or pomade every day and wash accordingly often, you're stressing your hair too – a few spritzes after washing keep it supple without getting in the way of the next styling day. And when your clients in the chair ask for salon-style keratin care: the Pro Hair Shampoo Keratin (salon size, 1000 ml) is the right base before the spray – wash, blot, spray, and your keratin routine at the basin is done.
Curls after summer: combining care and styling
Curly hair suffers especially in summer, because moisture escapes faster over the curved hair surface – the curls then hang frizzy instead of defined. Keratin for curls works best in two steps: first the conditioner as a care base in towel-dry hair, then the Foam Wax Keratin for definition and flexible hold. How to shape curls with it without weighing them down is covered in its own guide: foam wax with keratin for curls.
Keratin spray or a keratin smoothing treatment at the salon?
The terms sound similar but mean two completely different things. A keratin smoothing treatment (often also called a Brazilian blowout) is a chemical reshaping treatment: an active blend is worked into the hair at the salon with flat-iron heat and changes its structure for several months – the hair falls permanently smoother afterwards. The spray, by contrast, is leave-in care: it changes neither the hair structure nor the hair shape, but cares for the surface – without heat, without an appointment, without commitment.
Keratin or Milk Therapy: which conditioner suits you?
Kabuto offers two two-phase conditioners with the same leave-in principle but a different focus:
- Two Phase Conditioner Keratin – the structure focus: the first choice after summer, for a rough feel, stressed, frequently styled or chemically treated hair. Cosmetically fills the surface and visibly smooths it.
- Two Phase Conditioner Milk Therapy – the moisture focus: ideal when the hair is thirsty rather than damaged – dry and dull, but without rough spots. The gentle everyday freshness care.
The rule of thumb: if your hair feels rough and brittle, reach for Keratin. If it feels dry but smooth, reach for Milk Therapy. You can also alternate between the two – Keratin after the swimming season, Milk Therapy once the feel has returned to normal.
Ready to get rid of the summer damage? The Two Phase Conditioner Keratin is the quickest way in, the Two Phase Conditioner Milk Therapy is the moisture alternative – you'll find both together with shampoos and more in our hair care collection.
Heritage
Kabuto Katana is a Japanese-inspired grooming brand from Austria: the precision and calm of the Japanese grooming tradition, translated into uncomplicated products for everyday life. Order directly at kabuto.at – ships within Austria only.
Frequently asked questions
Do you have to rinse out the two-phase conditioner?
No. The conditioner is a leave-in product: shake, spray into towel-dry hair, comb through – and leave it in. It replaces the classic in-shower conditioner and keeps working while you dry and style your hair.
How often should you use a keratin spray?
Two to three times a week after washing is a good rhythm. If your hair is heavily stressed after summer, you can use the spray after every wash – the important thing is to skip the roots and work into the lengths and ends.
Does keratin spray help with split ends?
Cosmetically yes: the keratin wraps around rough spots, visibly smooths the hair surface and ensures that less snags and breaks off – the hair looks better cared for and less prone to split ends. But no care product can rejoin ends that have already split – only the scissors can remove those.