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Good Behavior Supreme Seal Smoothing Serum-Oil

IGK

Current Price $34.00
1.7 Ounce- Only 2 left
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Highlights

  • Coconut oil
  • Good for: Dullness
  • Anti-frizz

Details & care

What it is: A high-shine finishing serum that provides frizz control for four days.

What it does: This concentrated formula imparts a mirror-like effect, smoothes the hair, contains UV protection and tames flyaways, even in high humidity.

  • Paraben-free; phthalate-free; sulfate-free; mineral oil-free; gluten-free; petrolatum-free; minoxidil-free
  • Made in the USA
  • Item #10759875
  • Core Product ID 333333T53Q

Ingredients

Dimethicone, C15-19 Alkane, C13-15 Alkane, Isododecane, C9-12 Alkane, Lauryl Laurate, Phenyl Trimethicone, Spirulina Platensis Extract, Cocos Nucifera (Coconut) Oil, Prunus Avium (Sweet Cherry) Seed Oil, Salvia Hispanica Seed Oil, Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract, Coco-Caprylate/Caprate, Caprylyl Glycol, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Brassica Campestris/Aleurites Fordi Oil Copolymer, Caprylic/Capric Triglyceride, Fragrance (Parfum), Phenoxyethanol, Limonene, Coumarin, Linalool
Ingredients are subject to change at the manufacturer's discretion. For the most complete and up-to-date list of ingredients, refer to the product packaging

Shipping & returns

This item qualifies for free shipping on orders over $89. View Shipping & Returns Policy.

Eligible Rack purchases made between 10/5/26 and 12/24/26 can be returned by 1/18/27 or 40 days after purchase—whichever is later. Online purchases: eligible items can be returned by mail or to a Nordstrom Rack or Nordstrom store. Store purchases: eligible items can be returned to a Nordstrom Rack or Nordstrom store. All returns are subject to our return policy terms.

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Verb IGK

This brand is part of BEAUTYSPACE, a global beauty destination offering a carefully edited selection of the world's most innovative beauty products, including cosmetics, skin care and tools. Since its founding in 1993, it has given emerging brands access to a broader market—through Nordstrom and other prominent retailers. Today, BEAUTYSPACE encompasses more than 70 global brands.

Reviews

(189)1894.6 out of 5
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Most helpful positive review

May 23, 2026

Super serum

[This review was collected as part of a promotion.] I have fine and wavy hair. It can be curly if I baby it, but I often lack the time. This serum is seriously helpful in taming flyaways as they appear, and taming any post-straightening frizz. It is such a lifesaver in the summer!
BrittanyI
Reposted from igk

Most helpful critical review

Dec 13, 2025

Good product overall just could be a bit better

[This review was collected as part of a promotion.] It's lightweight and easy to pack around if needed. It is easy to apply but the cap does get annoying because you have to pull it off and pump it. There is a good amount of product for the price. Having curly hair that can get frizzy it is definitely helpful but it isnt much different from other anti frizz products
tyw29_6228
Reposted from igk

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5 stars64%
4 stars29%
3 stars7%
2 stars0%
1 star0%
May 23, 2026

Super serum

[This review was collected as part of a promotion.] I have fine and wavy hair. It can be curly if I baby it, but I often lack the time. This serum is seriously helpful in taming flyaways as they appear, and taming any post-straightening frizz. It is such a lifesaver in the summer!
Reposted from igk
BrittanyI
Feb 11, 2026

Helps reduce frizz

[This review was collected as part of a promotion.] This product is a medium weight product for your hair that definetly helps reduce frizz. It absorbs nicely into the hair leaving it shiny and frizz free. This lasts in your hair for quite a while keeping you happy!
Reposted from igk
samanthat27_6709
Dec 13, 2025

Good product overall just could be a bit better

[This review was collected as part of a promotion.] It's lightweight and easy to pack around if needed. It is easy to apply but the cap does get annoying because you have to pull it off and pump it. There is a good amount of product for the price. Having curly hair that can get frizzy it is definitely helpful but it isnt much different from other anti frizz products
Reposted from igk
tyw29_6228
Nov 23, 2025

Salon smooth hair in a bottle!

[This review was collected as part of a promotion.] IGK’s Good Behavior Supreme Seal Serum actually does what it promises, it smooths frizz and adds shine without making my hair feel heavy or oily. Even on humid days, my hair stays sleek and soft. I only need a tiny bit, and it layers nicely with other styling products. It honestly gives that fresh from the salon finish at home and it smells great.
Reposted from igk
melissaw670_2696
Nov 22, 2025

Helped my crazy hair

[This review was collected as part of a promotion.] My hair has had a lot of new growth and fizziness’s healing my thinning hair. This anti frizz serum was very helpful with all of my crazy flyaways without making my hair greasy.
Reposted from igk
mkcarroll_3831
Oct 27, 2025

Frizz free

[This review was collected as part of a promotion.] Eliminates frizz leaving my hair feeling soft and clean! At an affordable price it’s easy and manage to repurchase . Packaging is cute and colorful , and doesn’t have any nasty smell to it.
Reposted from igk
daijaclark_7275
Oct 26, 2025

Adds shine without feeling oily

[This review was collected as part of a promotion.] This was super easy to use. Doesn’t feel greasy yet adds shine & smooths the hair strands. A little goes a long way so it’s a great value. Easy to use pump & practically unscented which is great… no strong smell.
Reposted from igk
chers6_322
Sept 21, 2025

Nice and light

[This review was collected as part of a promotion.] This serious smells so nice - very salon quality. I thought since it’s an oil it might feel heaven but it doesn’t at all. I have thin hair and it doesn’t weight down even when used in dry hair.
Reposted from igk
nicolew359_1063
Sept 9, 2025

Works well

[This review was collected as part of a promotion.] I received this for free to try and review from Influenster. I have a lot of fly aways. I used this on wet and dry hair and it worked really well. I just don't care for the scent.
Reposted from igk
bizhappyhippie_5988
Aug 21, 2025

Fritz be gone

[This review was collected as part of a promotion.] I live in a very humid place so frizzy hair in the summer is my biggest struggle. This hasn’t totally eliminated all the frizz, but it definitely has helped keep it at bay throughout the day! I’ve been very pleased with the serum and its scent.
Reposted from igk
sarahpa4ad_9232
Aug 9, 2025

Smooth Styles

[This review was collected as part of a promotion.] This serum is perfect when I do my slick back bun. That’s mainly the hairstyle I keep my hair in. The front of my hair has the most frizz and flyaways. It keeps everything smooth down and frizz free. It also gives it a nice shine. Not greasy. Overall it’s a good serum especially for sleek styles. I will keep using.
Reposted from igk
aliciap283_4988
Aug 6, 2025

I’ve used better, but it works a bit

[This review was collected as part of a promotion.] First two photos are before use, second two photos are after use. My flyaways were still visible, and my hair was still frizzy. I don’t like how oily it feels (I know it’s an oil, but it’s so thin and greasy, it doesn’t absorb). If I had used more on my hairline, it MAY have tamed the flyaways, but my hair would’ve looked like I hadn’t washed it in days. It isn’t easy to apply evenly, you really have to be careful with it so you don’t have greasy areas. However, I have used it a few times since in combination with my other hair oils, just for some added shine— I just only use a little bit. If you have a go-to hair oil already, don’t switch to this one. If you are searching for an anti-frizz hair oil, I’d suggest not using this one, as it won’t even tame the small amount of frizz I have.
Reposted from igk
bethanynt33_8275