Hydrating Shampoo 8.5oz
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Weightless Moisturizing, Color Protecting, Anti-Aging.

For Normal to Dry Hair


Weightless moisturizing, Color Protecting, Anti-Aging.
For normal to Dry hair – Won’t weigh hair down.
Foaming lather – Sulfate & Sodium Chloride Free, Gluten Free and Paraben Free.
Highly concentrated formula. Desire more lather – add more water not more product.
Emulsify in hands and massage into wet hair. Lather. Rinse. Follow with L’eau de Mare Hydrating Condition.

For best results shake bottle well before using.

+Fact Sheet

+Safety Data Sheets


SKU: 03004

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N4 Blog

7 Simple Tips to Maintain Your Hair Color

7 Simple Tips to Help Maintain Your Hair Color

7 Simple Tips to Help Maintain Your Hair Color 546 450 Number 4 High Performance Hair Care

7 Simple Tips to Help Maintain Your Hair ColorBONJOUR DAH-LING!

Whether you’ve pulled out all the stops at the salon, or saved your dollars with a DIY dye session, changing your hair color is a fantastic way to boost your mood and switch up your look… And these days there’s almost no limits to the colors you can use to enhance your appearance. It’s also a great way to boost your spirits in that post Xmas lull.

But no matter how happy you are with your finished look, there is a downside to dying… And that’s the upkeep, particularly if your chosen ”do” is dramatically different to your natural locks. And let’s face it, sometimes we all went to let loose and try something a bit riskier.

With these simple tips from our top Number 4 stylists, you can prolong the life and vibrancy of your colored hair; meaning you enjoy fewer trips to the salon, and more life from your favorite colors.

Try These 7 Stylist Approved Tips to Boost and Maintain Hair Color

1. Don’t wash your hair for a while

No matter how tempted you might be, it’s worth waiting at least 24-72 hours after coloring your hair before getting in the shower. This waiting period will give the dye more chance to settle into your hair, instead of washing out immediately.

If you really can’t wait, you could try rinsing your hair with cold water, scrubbing your scalp with your fingertips. This will help cleanse the hair and scalp without washing out the color.

2. Watch the water temperature

Did you know dah-lings that the temperature of your shower can have a dramatic effect on the vibrancy and durability of your hair color.

Hot water can cause the cuticles in the hair to swell and open, which leads to the dye molecules being able to rinse away. Strangely, this is particularly important for the redheaded beauties among you. Red dye tends to have larger molecules than other colors.

To maintain a vibrant and long-lasting hair color, simply turn the temperature down in your shower.

It’s also a good idea to limit the amount of times you wash your hair in the week. Washing daily will strip the hair’s natural protective oils, and result in hair that’s less healthy and shiny.

If you have over washed your hair in the past – don’t panic! You can restore the oils by using products like Number 4 Hair Fluoro5 Elixir Restore & Repair Oil and limiting your hair washing sessions going forward. If you can’t skip the shower, invest in a hair cap to keep your hair dry in-between washes. It might look a little old fashioned, but it does work a treat.

3. Ditch the sulfates

Sulfates can be found in the vast majority of shampoos and hair-care products… But they’re awful for colored hair! These aggressive cleansing agents are often too harsh on colored hair, and will speed up fading.

So, when picking your color-friendly shampoos, look out for sulfate-free products that are specially formulated for color-treated hair. Shampoos like the Number 4 Hair Hydrating Shampoo are free from sulfates, sodium chloride, gluten, and parabens that can strip the hair color and will help add some much-needed hydration to colored hair.

In addition to finding the right shampoo, it’s essential to condition your hair after every wash. A color-safe conditioner like Number 4 Hair Hydrating Condition will help repair damaged hair, and forms a protective barrier that can lock in color as well as moisture for shinier, glossier, healthier, more vibrant hair. Number 4 really is your colored hair savior.

4. Let your hair air-dry

We mentioned already that heat is the enemy of beautiful colored hair, but this goes beyond the temperature of your bath or shower.

Using heat when styling your hair creates the same risks as a hot shower: it can open the cuticles and allow the color molecules to fade away.

If you really must use a blow dryer or other heat-based styling techniques on your colored hair, be sure to do it properly.

Start by prepping your hair with a multi-tasking hair primer, like the Number 4 Hair Super Comb Prep & Protect Spray. This will help strengthen your hair and provides plenty of heat protection while also detangling strands and making styling easier.

Once you’ve protected your hair, use the lowest heat setting only to blow-dry your hair, and be sure to hold the dryer at least a few inches away from your locks to minimize any heat damage as you go.

5. Do a deep conditioning once a week.

As many of us know a little too well, coloring your hair can often leave it feeling dehydrated and a little lackluster. By giving it some TLC with a weekly deep conditioning treatment, you’re sure to enjoy happier, healthier, more moisturized hair… And don’t forget, hydrated hair means more vibrant colors!

Often, this dry, damaged appearance is due to the dye stripping your hair of protein. A hair mask like the N4’s Reconstructing Hair Masque will infuse your locks with much-needed protein plus a generous helping of Vitamin B5 and natural conditioners to strengthen, smooth, and replenish normal, dry, or damaged hair.

6. Use products with UV protection (or wear a hat!)

Like any other heat source, too much sun exposure can strip your hair of its color. Even if you don’t dye your hair, you’ve likely experienced the lightening effects of sunny days on your hair. This can affect hair in both winter and summer months!

This means it’s essential to look out for hair care products that offer UV protection if you don’t want the sun to bleach your colored locks.

The Number 4 Hair Hot Weather Hair Help is perfect for summer days, offering your hair plenty of protection against chlorine, excess oils, and more.

You might also want to keep a Super Comb Prep & Protect Mini in your purse on sunny days. Not only will this leave-in conditioning spray help strengthen and nourish your locks, but it also offers a UV. Color Polar Shield that will ensure your dyed hair stays vibrant and healthy, even in direct sunlight.

7. Keep those split ends trimmed.

Our N4 stylists recommend getting your hair trimmed no less than every 6-8 weeks. This is particularly important dah-ling if you dye your hair and want to keep it healthy!

But don’t worry, this doesn’t mean you need to go through a drastic restyling every couple of months. Just keeping the frayed ends at bay will be sufficient to maintain your ideal look all year round.

We hope you found these top tips useful. Don’t forget to explore the N4 blog for more insider tips and tricks. And as always, don’t forget to give us a follow on our social channels where you’ll discover even more creative ways to manage your style and your hair color.

We Care




Sulfate & Sodium Free









Benefits of All Number 4 Products

Flex-net Resins

To provide flexible
style with shine

Humidity Resistant Technology

Reduces friz & flyaways


Shields hair from heat


Easy to cocktail together
or layer in hair


To prevent drying hair


Provides extra conditioning


For all hair types
Use on wet or dry hair

Room for

Find what works for you

Number 4
Liquid Complex Culture

Number 4 Liquid Complex Culture is the backbone of our brand, defining all of our products and drawing upon water and an advanced delivery system that takes beneficial botanical agents and technology to achieve consistent high performance hair care results.


Liquid VibranceTM

Nutritive to hair and scalp, moisturizes and enhances shine. Contains a blend of vitamins and minerals to restore natural vibrancy. Color protecting. Contains Black Currant, Soy Yogurt, Algae, Yerba Mate


Liquid VitalityTM

Contains potent anti-aging properties which promote and enhance youthful vitality. Rich in antioxidants. Contains Acai Berry, Hibiscus, Mangosteen, Vitamin C


Liquid DefenseTM

Hydrates and strengthens. Repairs damage, revitalizes and restores. Helps protect from the adverse effects of heat styling, chemical processing and environmental factors. Contains Burdock Root, Oolong Tea, Irish Moss, Vegetable Protein


Liquid PurityTM

Sulfate & Sodium Chloride free formulas prevent build-up while protecting color and natural sheen. Contains Lemongrass, Gooseberry, Organic Oatmeal, Golden Seal

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Customer Reviews

Based on 18 reviews
Nicki F
Hydrating Shampoo

Love the shampoo, my hair is dry. This shampoo has made my hair so soft and more manageable. They also gave me some samples of there condition hair mask. It is wonderful. Also, it smells so good!!

Kat Webb

Love this shampoo and this is very reasonable price compared to other sites. Highly recommend

Amanda F.
The Best Shampoo!

I’ve tried so many different shampoos through the years, & I always return to this one at some point because it simply works so well. I live in an area that has very hard water, and this helps make sure both my hair and scalp are in good condition even when the water isn’t great. I find this still lathers & cleans extremely well even with hard water.

I’m also 17 months postpartum from having my most recent child and this shampoo is helping maintain the strength of my hair as it continues to regrow after that notorious postpartum hair loss most women go through after a baby. I strayed away from the shampoo for awhile, and my scalp really noticed, as I had extreme dry patches. This shampoo is worth every penny.. and the smell is beautiful but not overpowering. Can’t recommend enough!

Linda Dahl
I have found my forever shampoo and conditioner

I have been using these two products for almost a year now and am so happy with the condition of my hair I will never use a now product.

Lauren Hugunin
No 4 Hydrating Shampoo and Conditioner are MY FAVORITE

I LOVE the No 4 shampoo and conditioner. They have made my hair so much more healthy and I love the smell. My hair stylist recommended them and I'm so glad she did.

13 reviews for Hydrating Shampoo 8.5oz

  1. Michelle

    This is my holy grail shampoo! The scent is heavenly, and it leaves my hair hydrated but not limp or oily. I believe this product helps keep my highlighted and heat-styled hair looking its absolute best.

  2. baxterdiane689

    I purchased this shampoo thru my salon where I have my hair colored. Initially, upon the first use, my hair felt tangled and stiff. Once I applied the conditioner, it helped, but no shampoo should make your hair feel tangled and rough. The conditioner is great, but the shampoo was not good for my fine color treated hair at all. What a disappointment.

  3. josephine.schagerstrom

    This shampoo is perfect for my colored curly and frizzy hair. Leaves no residue and makes my hair fresh and clean and brings out the true beauty of my hair. I will never stop buying it.

  4. davnbird (verified owner)

    I have been a loyal fan of Number 4 Hydrating Shampoo for years; however, the last bottle I received was totally different from the previous bottle. The product was brown, did not lather at all, and left my hair lank after washing. I will not be buying any more of this brand.

  5. Dora J Crow

    The texture, scent & cleansing w/out stripping my purple color off is sensational. I thought I’d never find a pro product (I am licensed managing cosmetologist) that would meet or exceed all my requirements. It’s luxurious feel & color of the shampoo to begin with is a zen-like experience. Once you get that nectar on your hair & start to shampoo? Heavenly scent of patchouli fills your shower. It leaves hair hydrated & moist. It actually does what it professes to do, unlike so many other products. I adore Number 4! Psst- your man will always want to smell you, wondering what that new scent is that you are wearing!

  6. Lauren

    I got a sample of this in my Birchbox and it is absolutely the most amazing shampoo I’ve ever used! My hair is normally dry and damaged from the blow dryer and curling iron and this shampoo completely transformed it! It’s so soft and I hardly get split ends now. Definitely going to keep buying it 🙂

  7. fawxed

    This shampoo is an absolute DREAM! Super concentrated, a little bit really does go a long way, but it really gets the job done. My tresses are silky and my frizz is greatly minimized. It also smells delightful. Do yourself a favor!

  8. sillyj435

    Love love love this. My hair was so soft and feels so healthy!!! Oh and it smells sooo yummy. I have curly hair and fight with hydration issues. With this I no longer fight. Thanks.

  9. cjtang4u

    I love this line! All of the lines smell great but the Hydrate one is my favorite. This one smells like honeysuckle and I get whiffs of it throughout the day when I use it. A little goes a long way!

  10. molson

    This shampoo has saved my life. Well, technically it saved my hair, but since my hair is a huge part of my life… you get the gist. I have naturally curly hair that easily falls flat and goes frizzy. I have received so many compliments since my hairdresser introduced me to No. 4. and all I have to do is wash and go–no fuss and my hair looks amazing and feels amazingly soft.
    Mega hydrated! I love this stuff and you will, too!!

  11. a1nettie

    I love the way this makes my hair feel. The scent is unique and initially strong and off putting, but when I felt how my hair felt I was sold!Super silky and I don’t feel like I “Need” a conditioner when using this. Excellent!

  12. julesc

    Perfect! I got a sample of both the hydrating shampoo and conditioner in my June Birchbox. Being a cosmetology student who’s currently trying like crazy to grow my hair out, I’m pretty picky about what I’ll put on my head. I decided to give this shampoo a shot and I’m hooked! Seriously, my usually frizzy hair has never felt so clean and soft, it’s even tamed my wiry, damaged ends from bleaching!

  13. emboog

    OMG. You must try this product! No disappointment will be had! Well worth the cost. Promise. Must follow-up with conditioner.

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