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Most UAE tap water starts as desalinated seawater, which leaves the plant fairly soft, then picks up minerals in the network and, crucially, in your building. Older towers and villas store water in rooftop or ground tanks, and areas that blend in groundwater, notably parts of Al Ain, Ras Al Khaimah and older Sharjah districts, run genuinely hard. Calcium and magnesium ions bind to the negatively charged surface of hair, building an invisible mineral film. That film is why hair here often feels coated but looks dull, why blondes drift brassy or greenish when copper is present in old pipework, and why conditioner seems to stop working after a few months in a new flat.

The film also sabotages chemical work. Keratin and protein smoothing treatments need the product to penetrate the cuticle and bond; a mineral layer blocks that, so the treatment sits on top and washes out in weeks instead of months. A stylist who knows the market will start a smoothing appointment with a chelating or clarifying wash to strip mineral deposits before applying anything expensive. If your at-home keratin quote does not include that step, ask why. The same logic applies to colour: minerals shift how dye develops, which is one reason a good colourist does a strand test with your actual tap water rather than trusting the swatch book.

Every product in a mobile kit has a temperature history, and in a UAE summer that history matters. A van parked in the sun reaches oven temperatures within an hour; nail polish separates and thickens, gel can begin to polymerise in the bottle, wax loses its formulation consistency, and creams split. The visible symptoms during your appointment are gel that drags and bubbles, polish that will not level, and wax that has to be overheated to flow, which is how burns happen. Professionals who take the trade seriously run insulated cases or simply never leave product in the vehicle. It is a fair and revealing question to ask a vendor how they store their kit in summer.

Humidity is the other half of the chain, and it peaks on the coast in July through September. Blow-dries collapse faster in 80 per cent humidity, so an honest stylist will steer summer event clients toward styles that fail gracefully, waves rather than poker-straight, updos rather than loose blowouts, and will finish with anti-humidity sealing rather than more heat. For makeup, the killer is the transition: you leave a flat chilled to 21 degrees, cross a car park at 44, and condensation forms on your skin exactly like it does on a cold glass. Long-wear silicone-based primers and proper setting exist to survive that specific ten minutes, which is why event artists here use them by default.

For hair work generally, the checks are quick but specific: a porosity check, wetting a strand to see how fast it absorbs, which decides processing time; a look at the scalp for irritation, psoriasis or folliculitis, which are reasons to pause and, for anything persistent or painful, reasons to see a DHA- or DoH-licensed dermatologist rather than a beautician; and a history question about henna. Henna matters because conventional dye and lightener over henna-treated hair can react unpredictably, and a lot of hair in this market has henna in its history even when the client has forgotten.

For nails, the equivalent inspection is of the nail plate and surrounding skin. Greenish discolouration under old gel, thickened or crumbling nails, or broken skin around the cuticle are all stop signs, some of them fungal or bacterial, and working over them seals the problem in. A conscientious technician will decline to apply product over a suspect nail and suggest a pharmacy or clinic visit first. That refusal is not upselling caution; it is the professional protecting you and her licence.