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Visible roots can reappear a few weeks after colouring, particularly around the temples, parting and hairline. Several solutions exist to camouflage them: root touch-up spray, root touch-up powder, temporary concealer or permanent at-home colour.
It all depends on the result you’re after. An instant touch-up won’t permanently alter your colour and usually washes out with shampoo. A permanent colour requires more preparation, but it’s better suited to tackling significant regrowth or regularly covering grey hair.
A spray or powder deposits pigments onto the hair’s surface. It’s a handy solution between colourings, but its staying power is limited. Product descriptions typically promise it will last until your next shampoo, even if the formula resists humidity or perspiration.
In contrast, a permanent hair colour works with a developer and requires you to follow the processing time to the letter. It’s not the product to grab for a quick fix just before heading out.
‘Blonde’, ‘chestnut’ or ‘brown’ cover several different nuances. A shade that’s too light can leave grey hair showing through, while a colour that’s too dark risks creating a harsh line against the lengths. Compare the shade to your current colour, not just your natural one.
For a blonde dye, check whether it’s a very light blonde, a golden blonde or a dark blonde. For a chestnut dye, the difference between light chestnut, cool chestnut and dark chestnut can be very noticeable at the roots.
Hair colourants can cause allergic reactions. The instructions from Revlon, Garnier, L’Oréal Paris and other brands recommend a patch test 48 hours before every use. This precaution is essential, even if you’ve used a similar shade before.
Never apply colour to irritated or damaged skin. Aerosol sprays are flammable: use them in a well-ventilated room, away from flames, heat sources and your eyes.
A temporary formula lets you keep your hair looking uniform between appointments or colourings, without immediately starting another chemical process.
Spray is quick to distribute along the roots, but you must keep to the distance stated in the instructions, usually between 10 and 15 cm. Spraying too close can stain your scalp or leave a very visible deposit.
Root touch-up powder allows for more precise application thanks to its brush. It’s particularly well suited to small areas, fine hair around the parting or touch-ups on the go.
A permanent colour kit typically contains the colour cream, developer, gloves and a post-colour treatment. Check the contents before buying, as well as the quantity needed if you have long or thick hair.
An ammonia-free colour may have a less noticeable smell, but the absence of ammonia doesn’t mean there’s no risk of an allergic reaction. Some formulas contain other sensitising colouring agents. Read the ingredient list and full instructions carefully.
Claims like ‘grey hair coverage’ or ‘100% coverage’ should be taken as the brand’s indication, not a guarantee that works for every head of hair. The result varies depending on porosity, starting colour, the amount of grey hair and the processing time.
Why this choice suits this profile: this root touch-up spray is applied to dry, styled hair in just a few seconds, according to the brand. Its 75 ml format is ideal for occasional touch-ups on blonde hair.
It doesn’t replace a permanent colour: its staying power is temporary and the instructions state it washes out with shampoo. The risk of choosing a solution that’s too long-lasting for a quick fix is therefore limited.
Application on dry hair, dries in about a minute and a compact format that’s easy to store. The brand recommends spraying about 15 cm from the roots.
Why this choice suits this profile: this mineral powder targets platinum and very light blonde hair. Its compact with a mirror and double-ended brush allows for precise touch-ups, at home or in your bag.
The brush helps avoid overloading the hair, which can result in a cakey finish. According to the product description, the powder washes out with shampoo.
Compact format, built-in mirror, dry application and water resistance claimed by the brand until shampoo.
Why this choice suits this profile: this kit is aimed at those looking for a long-lasting at-home colour, rather than a simple cover-up between applications.
The kit includes colourant, developer, gloves, conditioner and instructions. It remains essential to perform the patch test 48 hours before each use.
Formula claimed to be ammonia-free, oil-based technology according to the brand and shade chestnut 4.0. The result depends on your starting colour and following the processing time.
We’ve put together a comprehensive list, updated in real time, of products that meet these strict selection criteria and European safety regulations.
A root touch-up spray or powder typically lasts until your next shampoo. Perspiration, rain, friction from a hat or applying too much product can affect the result. A permanent colour changes with regrowth and requires different maintenance.
Shake the can, protect your shoulders, then apply the product to dry hair, keeping to the distance stated, often 10 to 15 cm. Spray in short bursts, leave to dry for about a minute and quickly wipe off any traces on your face. Never use the aerosol near a flame or in a poorly ventilated room.
It can visually camouflage grey hair and regrowth, but its effect is temporary. The shade, amount of powder and starting colour all influence how uniform the result looks. For a lasting change, refer instead to the instructions for a permanent colour suited to your shade.