
Plex Treatment
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Plex Treatment
Plex Treatment
A salon-worthy treatment for softer, stronger, healthier hair. Heat styling, colouring, and even day-to-day stressors can cause significant damage to strands. This Plex Treatment deeply penetrates hair fibres, restoring and reconnecting damaged and broken bonds from the inside out. 300ml
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- Shipped within 1 working day
BENEFITS
BENEFITS
- Salon-worthy strands from your bathroom with this protein-powered treatment for stronger, softer, healthier hair
- Deeply penetrates hair fibres, restoring and reconnecting damaged and broken bonds from the inside out
- Not just a routine, but a journey – you should see restorative results after a few washes
- Formulated with powerhouse ingredients like hydroxypropylgluconamide (designed to penetrate deep into the hair cortex to repair and strengthen hair from within), hydroxypropylammonium gluconate (helps strengthen and restore damaged hair fibres) and hydrolysed wheat protein (helps fill gaps in the hair shaft, reinforcing weakened areas and adding strength to the wave structure – crucial for maintaining defined waves after bond repair).
- Comes with an irresistible tropical scent
- Forever lightweight - all of Merwave’s products are specially formulated to ensure your waves won’t be weighed down
- Silicone, sulphate and paraban free
- Safe for coloured or bleached hair
INGREDIENTS
INGREDIENTS
Aqua (Water), Cetearyl Alcohol, Cetrimonium Chloride, Behentrimonium Chloride, Propylene Glycol, Persea Gratissima (Avocado) Fruit Extract, Hydroxypropylgluconamide, Hydroxypropylammonium Gluconate, Hydrolyzed Jojoba Esters, Hydrolyzed Wheat Protein, Polyquaternium-7, Panthenol, Citric Acid, Glycerin, Phenoxyethanol, Benzyl Alcohol, Sodium Benzoate, Potassium Sorbate, Sorbitan Caprylate, Parfum (Fragrance).
SHIPPING & DELIVERY
SHIPPING & DELIVERY
All orders are processed within 1 to 2 business days (excluding weekends and holidays).
UK Mainland Orders - FREE Over £50
All orders are processed within 1 to 2 business days (excluding weekends and holidays) after receiving your order confirmation email. You will receive another notification when your order has shipped.
Free shipping on all orders over £50 to UK mainland (does not include Northern Ireland).
Orders under this threshold cost £4.
Next Day Delivery - £7
We also offer Next Day Delivery for UK mainland orders at £7. Orders must be placed before 1pm (Monday to Friday) to be eligible for next working day delivery.
Orders placed after 1pm, on weekends or on bank holidays will be dispatched the next working day. Next Day Delivery is available on UK mainland orders only and does not include Northern Ireland.
Europe Orders - FREE over €70
Orders under this threshold will cost €10.
Does not include local taxes.
Delivery time is 5 business days.
Australia Orders - FREE over $155
Orders under this threshold will cost $12.
Delivery time is 7-14 business days.
Canada Orders - FREE over $120
Orders under this threshold will cost $17.
Delivery time is 7 business days.
Tracking
When your order has shipped, you will receive an email notification from us which will include a tracking number you can use to check its status. Please allow 48 hours for the tracking information to become available.
If you haven’t received your order within 10 business days of receiving your shipping confirmation email, please contact us at hello@merwave.co.uk with your name and order number, and we will look into it for you.
Once an order is placed we are unable to make any amendments.
This includes order details, like adding products, and also altering your shipping address. You may be able to amend your address using the courier self service options once your order has been despatched. In this instance, we'd recommend proceeding with your order and returning any items you no longer wish for.

Before + After
Check our these real life results, using the Merwave range.
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How does hair become damaged?How does hair become damaged?
95% of hair is made up of protein bond structures that provide strength, stability and shape. Hair damage occurs when these are broken down, leaving strands spongy, weak and split – eventually breaking off. Moisture is hard to retain, and brittleness and frizz are common.
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How does the plex treatment work?How does the plex treatment work?
The formula is powered by two small-molecule ingredients (hydroxypropylgluconamide and hydroxypropylammonium gluconate) that penetrate deep into the cortex to create new hydrogen and ionic bonds – restoring and reconnecting fibres for up to 3 x stronger hair compared to untreated strands.
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What results can I expect?What results can I expect?
As the plex treatment rebuilds bonds, it strengthens the hair, making it more resistant to breakage and damage.Elasticity will improve, and strands are able to retain moisture and be more resilient to styling. Expect soft, shiny, frizz-free waves! Remember: Restoring damaged hair takes time and patience – you may need a few treatments before you see results.
How to use
"Through years of colouring, heat and everyday life, my waves were damaged and crying out for some extra love. I created this because I needed a formula that could actually repair the damage from the inside out. I love how this plex treatment rebuilds the broken bonds, brings back strength and smoothness, and makes my hair feel like itself again – soft, healthy and full of life."
Our mission
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Real ResultsReal Results
Zero hair retouch, authentic results from products that are tailor-made specifically to care for wavy hair
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Forever LightweightForever Lightweight
Focussed on thoughtfully-sourced ingredients for formulas that never weigh down waves
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CREATING COMMUNITYCREATING COMMUNITY
It’s not just a routine, it’s a lifestyle. Proudly celebrating connection - making waves with over 160,000 and growing!
You + Merwave
Our Merwave community is our heartbeat; see how they shape & inspire us
Having very fine, low density hair, that gets overloaded with product so easily, my hair is somewhat frustrating and a challenge every day. Too much conditioner and it goes flat, too many products and it’s stringy looking. Wake up in the morning I look like a scarecrow, I really didn’t know what to use and what not to use because everyone with lovely curls seems to use everything and loads of it! I have to be really careful to use the tiniest amount of everything. About two months ago I was nearly ready to give up my curly journey, I’ve been on it for two years now and with each trim I could see my pre damaged straightened hair slowly being cut off and the waves and curls starting to show, this gave me hope especially when I got the odd good curly day I’d be so happy because a good curl day makes me look like I’ve got some extra hair with body. Anyway I’ve been through numerous curly brands, bought sooo many products and never really feeling I’d got it right, but just recently I thought I’m going to go back to basics and give it one last shot, I took away the, deep conditioners, leave in curl creams, gels and anything I thought might be too much for my hair, and try something much less producty and heavy, So now I only use Merwave shampoo, tiny amount of conditioner, which I have to use to comb out any knots, then use two to three pumps of number 4 cast foam worked all over my hair and scrunched , then using my microfiber towel gently blot the surplus water off, then spritz with refresh spray, scrunch again followed by my diffuser. I partially dry my hair , get dressed, makeup on and my hairs then normally dry. I feel a slight cast on my hair from the cast foam which seems enough to hold my waves for the day. I give a quick scrunch and fluff at my roots and now I seem to have, soft, defined waves and curls, much less producty and more defined . I’m so much more happier with it now, just hope my new regime keeps working.
Thank you Merwave, please don’t run out of my two favourite products🫶🏻
So … I have been straightening my hair for years.. but have noticed since menopause my hair has become a bit thinner and wavy. I love merwave as it has made my hair regime straightforward and my hair has become more curly since I started using it. Love also the extras.. the lovely hair wrap and bath robe!!! Great products.. smell wonderful… one very happy customer here!!!!
I have been using Merwave products for about 5 months and my waves have never looked better. In fact for the first time in a long time, I let my natural waves shine. I use the wave cream, foam and gel (just a little bit of each) as part of my styling routine. I also have been using the Repair & Restore Plex Treatment once a week and it has made such a difference. My hair is softer and not frizzy. I have very thin hair and these products do not weigh my hair down. I also love the support you get with emails on styling and care tips for waves. I have tried some many other products in the past, from inexpensive to highly expensive, and Merwave ( which is reasonably priced for the results you get) is the end of my search. Highly recommend!
So after 40+ years of straightening and abusing my hair I decided to embrace my waves. I started with supermarket buyable brands because they were “cheap”, but they didn’t give lasting results. Then I tried another well advertised brand (that really wasn’t cheap) but it dried my hair out to the point of it breaking! Turns out even though advertised as for all curl types it really only was for 3b upwards!
So I reset and read up and decided to go for a curly cut to rid myself of damage and learn how to manage my wave patterns.
Thats where I discovered Merwave! The Salon loved it and I did too, they showed me the started pack, how to use all the products in it, and how little you needed to use to get results. I walked out of the appointment with the most amazing hair! And it was 5 days before I needed to wash again, which was spot on because my starter pck had arrived by then. I was so happy that recreating what my hairdresser had done was simple, these products are perfect for home use. Your hair tells you when you need #3 or Plex in the routine! The microfibre towel is just perfect too! I can’t wait for the hair mask to be back in stock so I can add that in to treat my hair!
You can tell this is a lightweight well thought through brand, that works on waves and curls, it has light and refreshing not overpowering fragrance. It’s designed so you don’t need a lot of product at each step, so it will last a while. Each product I tried before this range caused scalp itching, this has caused no irritation at all.
I 100% recommend Merwave x
So, my perimenpausal hair took my curls away and the curly products I was using just made my hair look lank and frizzy.
I decided to treat myself and give Merwave a go, buying the pack of 5 products (which came with a free intense conditioner) as well as buying the bonding shampoo, wide tooth comb, hair oil and microfibre towel.
Four weeks in, it's been a learning journey (who knew my hair needed protein) but my curls are BACK with a bang! My hair looks thicker, the frizz has minimised and it's a far happier head! I feel proud of my hair again, and a lot more confident too.
The weekly emails with links to tutorials and blogs have been really helpful also and is a nice touch as a customer (you feel like you're cared for)
Thank you Merwave!
The photo taken was on a Sunday morning, no make up buy HAPPY SHINY HAIR!!!
These products are amazing, they have literally changed my whole attitude to my curly hair. Previously it was a nuisance that had to be tamed, but now it is an asset to be celebrated - thank you so much Merwave for freeing me! I’m 68 years old and finally embracing what nature has given me, and the compliments have been rolling in, I won’t be going back to straightening any time soon.
Love these products, I’ve been using 1-5 for a while now and love that I can create waves that were never there before. My hair is getting healthier too (especially since the launch of the Plex treatment). Finding what works for you can take some time and sometimes you need to change your routine up a bit but definitely worth it. I heat-style my hair occasionally but love that I can go back to these products straight after to go back to beautiful natural waves.