Smoothing Balm 4.9oz
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Soft, touchable, polished styles.

For all hair types.


With the ability to tackle complex textures of frizzy, wavy, unruly locks, Smoothing Balm reshapes hair into soft, touchable, polished styles. Fluoro Technology makes it all possible with the ability to create the tiniest smoothing molecules that enable the finest Number 4 ingredients and Liquid Complexes to go into the hair’s core and work faster, reducing drying time while creating a shield of humidity resistance and heat protection.

– Highly Concentrated – Use a small amount for big results.
– Reduces Tension when Blow Drying
– Good for All Hair Types

Color Protecting, Anti-Aging, Vegan, Gluten Free, Sulfate & Sodium Chloride Free, Paraben Free.

+Fact Sheet

+Safety Data Sheets


SKU: 00384

How-To Videos

Smoothing Balm Consumer

N4 Blog

Loving Your Hair After Covid

Hair Loss After Covid-19, There is Good News

Hair Loss After Covid-19, There is Good News 546 450 Number 4 High Performance Hair Care

Losing your hair after covidBONJOUR DAH-LING!

COVID-19 took a toll on us for a lot of reasons and if you’re someone who was unfortunate enough to experience it first-hand – you may know what we’re talking about. Not only did coronavirus create chaos with our internal systems, and even our skin, but for some, it even caused thinning hair and hair loss!

And just like many others, we aren’t going to be so blasé about it! Dah-ling, hair shedding is not something to be taken lightly. So what can we do about this?

Number 4 has you covered with our top tips to thicken up your hair and leave you looking as good as new in no time! From the best growth products to the ultimate illusion hairstyles – say au revoir to thinning hair.

Wash Your Hair Enough… but Not Too Much

Yes, we know this is confusing but we’ll explain. We’re looking for what you might call… the Goldilocks amount, as the washing hair schedule for thinning hair needs to be just right. And this seems to be between 2-3 times per week especially for those experiencing hair loss.

Your hair’s natural oils are essential for healthy hair. For shine and general hair health, there is nothing better than letting mother nature do her thing.

So… a dirty truth about overwashing is that it could actually be worsening your hair loss!

But (and there is a but) – under washing your hair can actually be much worse! Especially if you’re someone who uses a lot of product in your hair, the build-up can be extremely bad for your scalp and can prevent hair from growing!

Not washing your hair enough can also lead to limp-looking hair (ugh!! we know right?), lacking in volume, making your hair appear even thinner.

So this brings us to our next point…

But we’re only human. And sometimes a GHD is the only answer on our worst BHDs!

So if you’re going to reach for the flat iron, be sure to use your Thermal Styling Spray from Number 4, to shield your mane from its wrath. Plus, enjoy a bit of hold too for the ultimate stay-all-day style!

Fake It ‘Till You Make It!

The Best Hairstyles for the Illusion of Thick Hair…

The Blunt Bob

Become a blunt bob babe and have all your friends thinking your hair has grown overnight!

The sharp edge provides a fool-proof illusion of thick hair, effortlessly! No extra styling necessary… say no more!

The ‘Messy’ Pony

The fluffy or ‘messy’ pony is a fan favorite and never gets old.

Start by spraying your Sugar Texturizing Spray directly into the roots of your hair for an instant, effortless lift. Then loosely gather your hair at the crown of your head before securing with a hair tie.

We know what you’re thinking… yes it really is that easy.

The Long Layers

Another style to keep the flat hair at bay – long, lightweight layers. Ask your stylist to bless you with this tousled cut and watch as effortless becomes you.

Stay chic, on-fleek and never bleak.

Simply add some of your trusty Texture Styling Cream from Number 4 and you’re ready to take on the world.

What thinning hair? We told you there was good news!

Choose the Right Shampoo and Conditioner to Prevent Hair Loss and Thinning!

Don’t Underestimate the Power of Shampoo

Choosing the right shampoo is essential to disguising and protecting thinning hair, as well as preventing future hair loss. Though, despite what some companies will allow you to believe, shampoo cannot magically thicken hair! Though it can help to add a little oomf and enhance your fabulousness…

Our Number 4 Hair Volumizing Shampoo will be your new best friend! It’s perfect for hair with a medium to fine texture to add a lightweight moisture, without sacrificing shine… so you’ll always feel picture perfect dah-ling!

Free of all the bad stuff, not only will it nourish your hair and keep it healthy – this shampoo can instill the confidence that Covid-19 tried so hard, and failed to take from you!!

Careful With the Conditioner

Conditioner is non-negotiable for beautiful hair, babe. We all know that. But is it possible to overdo it?  Oui!

Overdoing it with your conditioner can actually leave your hair looking lifeless, oily and THIN. The exact opposite of what you’re going for.

Number 4 have the perfect solution with their lightweight Volumizing Condition. Shine and volume can come as a package deal and the proof is right here!

The lightweight formula is unlike other conditioners, as it helps to look thick without weighing down those luscious locks!

Though there is one condition – only use the recommended amount! You know what they say about too much of a good thing…

Beat the Heat!

Hot tools are convenient and addictive, trust us we know. But if you’re seriously looking at protecting your sparse locks and preventing further hair loss – the consequences might be worse than this goodbye…

Too much heat just adds to breakage and thins hair even further, so using hot tools on the daily is possibly not the best choice to make.

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 12 reviews
Audrey D.
Luxury in a bottle

N.4 really stands out as the best hair products I have EVER used!

Lauren Buxbaum
Product great

Product is great; fragrance is a very masculine bust.

amazing for frizzy hair!

This is the best thing I've ever found for my hair. My hair is very thick and the top layer frizzes up, especially in the summer. Just a little of this works wonders. It's truly amazing how smooth it keeps my hair, even in August humidity in NYC. Pleeeease please never stop making this product!!

Jessica K.
I really like it!

First, it has a very nice smell and I’ve noticed it makes my hair feeling soft and smooth.

Ashley T.
Best Ever!

This stuff is amazing! I discovered it years ago from a Birchbox sample and haven't stopped using it. I have naturally wavy, frizzy hair. When I use a pump of this after washing my hair, I can let it air dry and it is so smooth. Please don't ever stop making this!

6 reviews for Smoothing Balm 4.9oz

  1. Michelle

    This product mixed with the Blow Dry Lotion leaves my hair looking so soft and shiny, like I just left the salon. I highly recommend.

  2. Rosella Morgan (verified owner)

    This stuff is AMAZING!! Seriously, hands down the best product I’ve used. It leaves my hair so soft, I can’t keep my hands off of it! I have natural curly hair and this keeps my straight style smooth and perfect all day – even with my contestant touching. Don’t hesitate, buy this – it’s worth it!!

  3. courtneymckibbin (verified owner)

    This stuff is incredible… I threw all of my other products away after one use. I have thick, naturally curly hair, and this deflated it without making it greasy. My hair is so soft and transformed; I can’t stop touching it! It works great for air drying or blow drying. Paired it with the hydrating shampoo and conditioner, and will never go back.

  4. lbeird (verified owner)

    I ordered the full sized Smoothing Balm after receiving a mini in a beauty box. I have very, very fine hair, styled in a pixie cut. I have a lot of hair, albeit fine. You wouldn’t think from the product details that this balm would work on my hair… but it does! It takes out static and smooths, but doesn’t weigh down my hair. I blow dry upside down, run a mini flat iron through, smooth a little balm on, and hair spray – DONE. It takes all of 5 minutes!

  5. ginnygirlu2

    This makes you feel just like you stepped out of a salon. the scent is so fabulous. I was hopeful it would smooth my thick hair but I was not expecting it to make it feel so healthy and like silk. I straigtened my hair and again, I did not expect it to help with my tools but it really cut the drying time down. I can’t believe it! It is that good & smells that good! kind of like a very light high end cologne. I don’t think it would offend many people’s nose. It is hard to find other than here. I received a small bottle in my #birthbox Need the big bottle but a little go’s a long way and I have long hair.

  6. vickisorders

    I’m 65 years old and used to have thick, heavy, lovely hair; I could do anything with it. Now, like most older women, my hair is thinner, drier, and more brittle. I still wear it long, so I’ve been looking for a product that will moisturize my hair and make it more elastic, will reduce the tangling at the ends (which leads to split ends), and will restore the smooth shine that I used to have. This is it. I still blow my hair dry for styling, and it left my hair smooth, shiny, and with thicker volume without feeling sticky, stiff, or oily. It almost feels like my 20-year-old hair again. Lovely product.

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