How to apply a hair mask is one of the most searched haircare questions on the internet right now, and we totally get it. We love a good hair mask. Who doesn’t love the idea of wrapping your strands in a nourishing cocoon of moisture so that they can emerge looking healthier, glossier and softer. It’s akin to therapy (though much cheaper and less emotional).

But, if your hair is still feeling dry, frizzy or just a bit lacklustre after your weekly hair mask ritual, the chances are that you’ve been doing it all wrong. Don’t worry, you’re not alone. Hair masks are one of those deceptively simple products that promise you the world – and can deliver – but require a little technique to get the results that you’re looking for.

The truth is, not all hair masks are created equally, and there’s a big difference between a leave-in and a rinse-out formula. Each type has its own purpose, and using the wrong method, or slathering on too much (or too little), can seriously undermine results. Even the best, most nourishing formulas can fall flat if your hair is damp in the wrong way, if the product isn’t distributed evenly, or if you leave it on for too short a time. And yes, rinsing with hot water? Big no-no. It might feel indulgent, but it can strip away the very hydration you’re trying to give your strands.

Then there’s the ingredients factor. Oils, proteins, humectants, ceramides, antioxidants, all these buzzwords actually mean something. Picking the right mask for your hair type and concern makes all the difference between a half-hearted quick fix and a true showstopper transformation.

Luckily, with a little know-how, it’s easy to get it right. From how to prep your hair, to applying the product like a pro, to timing it perfectly, the right technique can turn your hair mask from a nice-to-have to a can’t-live-without step in your routine. And who better to ask than celebrity hair stylist Melissa Timperley and Beauty Club London co-founder Louise Bailey? Here, they break down exactly how to use both leave-in and rinse-out hair masks to get soft, shiny, healthy hair every time.

“The best hair mask for you depends on your hair type and concerns, but certain ingredients consistently deliver strong results,” Melissa says. “Look for nourishing ingredients such as shea butter, Argan oil, coconut oil or avocado oil if your hair is dry or damaged.

"For strengthening benefits, seek masks that contain proteins such as keratin, hydrolysed wheat protein or collagen peptides. If your hair is fine or easily weighed down, choose lightweight masks with ingredients like aloe vera, glycerin or hyaluronic acid that hydrate without leaving residue.

“Masks with ingredients such as ceramides, peptides and antioxidants can help repair the hair barrier and protect against environmental damage. Products that are sulphate-free and silicone-free are often preferred for long-term hair health, especially if you are avoiding buildup or irritation.”

“A leave-in hair mask works by staying on the hair to provide continuous hydration, strength and protection throughout the day. To use one effectively, begin with clean, towel-dried hair so that excess water does not dilute the product,” Melissa tells us. “Apply a small amount and focus on the mid lengths and ends, as these areas need the most moisture and are most prone to dryness and breakage. Distribute the mask evenly using your fingers or a wide-tooth comb. Once applied, style your hair as usual. Because leave-in masks stay on the hair, they work slowly and steadily, improving softness, shine and smoothness over time.”

“A rinse-out mask is designed to provide a concentrated boost of nourishment in a short period of time,” Melissa says. “Start by shampooing your hair to remove product buildup, oils and impurities, as this helps the mask penetrate more effectively. Gently squeeze out any excess water so the hair is damp rather than dripping. Apply the mask from the mid-lengths to the ends and comb it through to ensure even coverage. Leave it on for the time recommended on the packaging, usually between five and fifteen minutes. Rinse thoroughly with lukewarm water until the product is fully removed.”