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All your at-home hair mask questions answered (by a professional)

Published on 28 April 2020 - Last updated on 19 December 2025 by Beth Ryan

I’m calling it guys, haircare is the next skincare. We’ve been obsessed with hyaluronic acid for ages, but now it’s all about hair masks, heat-free curls and silk scrunchies. You heard it here first. So, in the name of our new passion, we asked Jake Unger, Head of Education at HOB salons all about hair masks and how to get the most out of them. 

By Beth Ludolf

  • 1 What kind of mask should I use?

    There’s a lot of choice, we feel you. For hair that’s been chemically damaged (bleach gang), Jake suggests protein-rich formulas, “look for masks that mention strengthening or repairing benefits”. For hair that is naturally dry, or has been mechanically damaged (through heat-styling), he suggests moisturising masks.

  • 2 Can you do treatment masks too often?

    “Using one particular type of mask too often may result in hair that is over-strengthened (which will make it brittle) or hair that is super-soft but lacking in strength,” Jake explains, “switch it up to balance out the benefits and boost both strength and hydration of your hair”.

  • 3 How long should you leave a mask on for?

    It depends, you should check the guidelines on the specific product you’re using. “Most products will usually recommend somewhere between 5 and 15 minutes,” Jake says, “but leaving it a little longer – up to 30 minutes – will make sure your hair gets all the benefits”.

  • 4 Should you leave a mask on overnight?

    The longer time they have to work, the better, right? Not necessarily. Jake says “unless the product is specifically designed as an overnight formula, leaving it on for longer than around 30 minutes won’t have any extra benefit, by then it will have reached saturation and will essentially stop working”. It won’t cause the hair any damage, though.

  • 5 What's the best way to apply a hair mask?

    Take a bit more time to apply the mask properly, it will help you get the most out of it. “Any excess water will dilute the mask, so make sure you thoroughly towel dry your hair before apply”, Jake suggests, “once applied, comb the product through the hair so it’s evenly distributed”.

  • 6 How can I maximise the benefits of a hair mask?

    According to Jake, there are a few tricks you can do after applying too. He suggests wrapping the hair in a towel-turban using a hot towel that’s been on the radiator, “the heat will help the mask to penetrate deeper into the hair shaft so it's extra effective, wrapping the hair in cling film and then a hot towel will really amp this up”.

    During this uncertain time, we’ll be continuing to create the content you love – whether for distraction, inspiration or to give guidance on wellbeing. If there’s anything you’d like to see (or not see) please contact us on Instagram @treatwell_uk. We hope you keep safe and healthy.

FAQs

How do you choose the right hair mask for your hair type?

Choose protein-rich masks for chemically damaged hair and moisturising masks for naturally dry or heat-styled hair. Strengthening or repairing formulas help bleached hair, while extra hydration is best for dryness or mechanical damage.

How often should you use a hair treatment mask?

Use a variety of hair masks and avoid using just one type too often. Overusing a single mask can make hair brittle or too soft, so switch between strengthening and hydrating treatments to boost both strength and hydration.

How long should you leave a hair mask on for best results?

Leave most hair masks on for 5 to 15 minutes, following the product guidelines. You can leave masks on for up to 30 minutes to ensure your hair absorbs all the benefits.

Is it safe to leave a hair mask on overnight?

Leaving hair masks on overnight is not necessary unless the mask is specifically designed for overnight use. Most formulas stop working after 30 minutes, so extra time will not give additional benefits or cause damage.

What is the best way to apply a hair mask?

Apply the mask to thoroughly towel-dried hair to prevent dilution. After applying, comb the product through your hair for even distribution, which ensures maximum effectiveness.

How can you maximise the effects of a hair mask?

Wrap your hair in a hot towel or combine cling film with a hot towel to boost the mask’s penetration. The heat helps the treatment work deeper into the hair shaft, making it extra effective.

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