• a white bottle with black text and black text

Sarah - Verified Buyer

Buy it! It actually works. I have THE worst hair, super thin, brittle, frizzy and to top it off thinning more due to my thyroid. I bought this and it actually makes my hair look good! I spray my whole head after showering and it makes my hair shiny, straight and frizz-free! I don’t ever write reviews but this is a stand up product that I can’t live without.

Valerie M. - Verified Buyer

I can't stop raving about this product to my friends who ask me how I get my hair so smooth and soft. I use it after shampooing my hair to keep my curls soft and smooth and I liberally spray it on before I use my straightening iron. It looks like I just left the salon.

JoJo. - Verified Buyer

With this product my flyaways and frizz are at bay! I am so happy I purchased this along with the rest of the Good Behavior line! I also apray on my dry styled hair b4 hairspray. My hair is so happy! My hair looks pretty and I am in tears writing this due to it has been so dry and damaged! Not anymore and only used a couple of times! Do not stop making this product!

Amy S. - Verified Buyer

This is the absolute the best smoothing\heat protectant I have ever used. It totally changed my fragile fine hair into softer stronger tangle free hair. Even after washing it I no longer need my leave in detangler, my hair is already tangle free. I am absolutely in love with this product!!! Wish I found it sooner!!!

Sarah - Verified Buyer

Buy it! It actually works. I have THE worst hair, super thin, brittle, frizzy and to top it off thinning more due to my thyroid. I bought this and it actually makes my hair look good! I spray my whole head after showering and it makes my hair shiny, straight and frizz-free! I don’t ever write reviews but this is a stand up product that I can’t live without.

Valerie M. - Verified Buyer

I can't stop raving about this product to my friends who ask me how I get my hair so smooth and soft. I use it after shampooing my hair to keep my curls soft and smooth and I liberally spray it on before I use my straightening iron. It looks like I just left the salon.

best seller

Good Behavior Smoothing Spray

Spirulina protein smoothing spray

1902 Reviews

+ Write review

$28.90

save 25%

0%
$28.90

save 15%

25% off • Free Shipping • Skip & cancel anytime

Buy On Sephora

a blue letter on a black background

Pay in 4 interest-free installments with ShopPay

A heat-protective blowout spray that mimics the smooth, frizz-free results of a smoothing treatment. 100% agreed their hair looked like they got a keratin treatment at a salon. Each 5.6 oz. bottle provides a 14 to 28-day supply, depending on use.

a purple shield with a check mark

Safe for All Hair Types

a purple stars on a black background

High Shine Finish

a purple icon of a woman

24-Hr Frizz Control

Safe for All Hair Types

a purple sun and shield with black background

450ºF Heat Protection

What it is

Application

Key ingredients

best seller

Brianna. - Verified Buyer

I love how shiny and beautiful it made my hair look, without looking greasy! I always struggle with these kinds of sprays for that reason, but IGK knocked it out of the park!

best seller

Good Behavior Smoothing Spray

Spirulina protein smoothing spray

1902 Reviews

+ Write review

$28.90

save 25%

0%
$28.90

save 15%

25% off • Free Shipping • Skip & cancel anytime

Buy On Sephora

Pay in 4 interest-free installments with ShopPay

A heat-protective blowout spray that mimics the smooth, frizz-free results of a smoothing treatment. 100% agreed their hair looked like they got a keratin treatment at a salon. Each 5.6 oz. bottle provides a 14 to 28-day supply, depending on use.

Safe for All Hair Types

High Shine Finish

24-Hr Frizz Control

Safe for All Hair Types

450ºF Heat Protection

What it is

Application

Key ingredients

a logo of wheat and a sticker

Gluten Free

a purple circle with a black silhouette of a beet

Vegan

a logo of a rabbit

Cruelty free

COMPLETE YOUR ROUTINE

Valerie M. - Verified Buyer

I can't stop raving about this product to my friends who ask me how I get my hair so smooth and soft. I use it after shampooing my hair to keep my curls soft and smooth and I liberally spray it on before I use my straightening iron. It looks like I just left the salon.

JoJo - Verified Buyer

With this product my flyaways and frizz are at bay! I am so happy I purchased this along with the rest of the Good Behavior line! I also apray on my dry styled hair b4 hairspray. My hair is so happy! My hair looks pretty and I am in tears writing this due to it has been so dry and damaged! Not anymore and only used a couple of times! Do not stop making this product!

Amy S. - Verified Buyer

This is the absolute the best smoothing\heat protectant I have ever used. It totally changed my fragile fine hair into softer stronger tangle free hair. Even after washing it I no longer need my leave in detangler, my hair is already tangle free. I am absolutely in love with this product!!! Wish I found it sooner!!!

Sarah - Verified Buyer

Buy it! It actually works. I have THE worst hair, super thin, brittle, frizzy and to top it off thinning more due to my thyroid. I bought this and it actually makes my hair look good! I spray my whole head after showering and it makes my hair shiny, straight and frizz-free! I don’t ever write reviews but this is a stand up product that I can’t live without.

WHAT IT IS

Spirulina protein in IGK Good Behavior Smoothing Spray strengthens and nourishes hair, while a unique formaldehyde-free bonding polymer, activated by heat, emulates keratin treatment's smoothing effects. This spray reduces blow-drying time, and offers protection against humidity, heat, and UV damage, ensuring soft, shiny, frizz-free hair with 24-hour frizz control and 450°F heat protection.


PRO TIP

a woman with long hair

The best part about Good Behavior Smoothing Spray is that you can use it any time you heat style. Whether your hair is damp or you need to refresh dry, day 3 hair with an iron, just apply it generously and style!

— The IGK Crew

Before/AFTER

a woman with long hair before and after
a woman with long hair before and after
a woman with long hair

Who It’s Best for

Who It’s Best for

Straight

Wavy

Curly

Coiled

Tightly Coiled

Everyone wants sleek, smooth, shiny AF hair. Good Behavior Smoothing Spray is formulated for all hair types—from slick straight to tightly coiled. Whether you go au natural or chemically treat your hair based on your mood, our keratin-like treatment spray is safe for your hair type and can help you achieve gorgeous, frizz-free hair.

How to use

step 1

Mist over damp hair in sections.

step 2

Comb through, ensuring every strand is thoroughly coated from root to tip.

step 3

Blow-dry in sections to seal in the treatment with heat.

step 4

Style as usual or apply again and finish with a flat iron for maximum smoothing.

KEY INGREDIENTS

Repairs

SPIRULINA PROTEIN

Plant-based protein that’s rich in amino acids, vitamins, minerals, and biotin to heal, strengthen, and nourish the hair and scalp.

Vegan

INNOVATIVE BONDING POLYMERS

Formaldehyde-free bonding polymers that mimic the frizz-free, high-shine coating of a keratin treatment.

See All Ingredients

Salon Born. Client Approved.

Salon Born. Client Approved.

IGK Products are exclusively designed by experts and formulated with everything you need (and nothing you don’t). Our products are proudly vegan, gluten-free, and cruelty-free.

a collage of a man
AARON

AARON

AARON

LEo

Founders

AARON

CHASE

AARON

FRANCK

Frequently Asked Questions

Everything you need to know about the Antisocial Dry Hair Mask

When should I use Good Behavior Smoothing Spray?

Do I need to use a heat protectant with Good Behavior Smoothing Spray?

Can I use Good Behavior Smoothing Spray on dry hair?

Can I use Good Behavior Smoothing Spray without heat styling?

Recommended for your hair type

Straight

Straight

Curls

4.97/5 (1502 Reviews)

Good Behavior Smoothing Spray

Spirulina Protein Smoothing Spray

$34.00

4.97/5 (1502 Reviews)

Good Behavior 4 in 1 Prep Spray

4-in-1 Prep Spray
$32.00

4.97/5 (1502 Reviews)

Good Behavior Blowout Balm

Spirulina Protein Smoothing Blowout Balm
$34.00

4.97/5 (1502 Reviews)

Good Behavior Ultra Smooth Shampoo

Ultra Smooth Shampoo
$32.00

4.97/5 (1502 Reviews)

Good Spin Curl Gelée

Flexible Curl Defining Gelée
$29.00

4.97/5 (1502 Reviews)

Class of ’93 Curl Cream

Perfecting Whipped Cream
$32.00

4.97/5 (1502 Reviews)

Mistress

Hydrating Hair Balm
$29.00

4.97/5 (1502 Reviews)

Legendary Shampoo

Dream Hair Shampoo
$32.00