CHI Keratin K-Trix 5 Smoothing Treatment, Hair Serum For Creating Smooth, Frizz-Free Styles That Last, Sulfate, Paraben, & Cruelty-Free, 3.92 Oz
Condition: New
Buy Now, Pay Later
As low as
$4
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
In Stock.
Arrives
Jun 25 – Jun 27
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
Features
- Thermally activated smoothing treatment combines with the heat of a styling iron to smooth the hair cuticle, lock in moisture and seal out humidity
- Long-lasting results, even after washing
- Infused with Keratix, a unique compound that utilizes sustained- release technology to gradually releases proteins, providing long-lasting treatment results
- Contains keratin a unique compound that utilizes sustained release technology to gradually release strengthening and smoothing proteins as needed for long lasting treatment results
Description
Gently cleanses and rids hair and scalp of impurities while balancing oils and strengthening the hair. The invigorating and soothing benefits of tea tree oil and peppermint oil work together to balance scalp oils and maintain moisture levels. Brand Story CHI haircare and tools are manufactured by Farouk Systems a Houston based company.
Is Discontinued By Manufacturer : No
Product Dimensions : 1.25 x 1.25 x 3.9 inches; 3.53 ounces
Item model number : CHIKT4
Batteries : 1 A batteries required.
UPC :
Manufacturer : Farouk Systems Inc
Best Sellers Rank: #13,899 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #35 in Hair Styling Serums
#35 in Hair Styling Serums:
Customer Reviews: 4.4 4.4 out of 5 stars (7,431)
Product Benefits: Maintains moisture levels.
Hair Type: Treatments
Scent Name: Tea Tree
Item Form: Liquid
Liquid Volume: 115 Milliliters
Number of Items: 1
Unit Count: 3.92 Fluid Ounces
Item Volume: 3.92 Fluid Ounces
Brand Name: CHI
Manufacturer: Farouk Systems Inc
UPC: 633911752623
Global Trade Identification Number: 23
Item Weight: 100 Grams
Material Type Free: Paraben Free
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Jun 25 – Jun 27
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
I recently cut my 2c coarse frizzy hair eleven inches. My hair now comes up to my shoulders and looks like a triangle bob when curly. Stupid me thought I could iron it every day. Dumb idea. After a month of ironing/blowdrying my hair every other day (with heat protector), my hair lost ALL its shine and barely holds a straightening. I didn't want to spend $300 on a permanent salon straightening, so I looked into many different options. It came down to an at-home keratin straightening with a full kit or this. I decided to try this, as it didn't seem nearly as harsh as the other one; I was scared an at-home permanent straightening could make my hair fall out. This seemed pretty idiot-proof :) ~EXPECTATIONS: Most of the reviews seemed to suggest that this was the miracle in a bottle I was looking for, but I was a little skeptical. It was only sold on Amazon and the Chi website, and I couldn't find reviews anywhere other than Amazon, which was both a little odd to me. No Youtube reviews or beauty blog posts on this product. I expected: 1) Softer silkier hair - due to the keratin 2) Straightening with flat irons and blowdrys that last longer 3) Heavier hair - also due to the keratin :) Keratin builds up on hair and can weigh it down, so I did buy a clarifying shampoo to go with it. ~HOW IT WORKED FOR ME: Holy cow! This was AMAZING. It did everything I expected, and more. I put it in freshly washed, mostly dry hair, even though instructions say to use it on damp hair. I also used a LOT, putting on each section of hair as I blew it, and my hair didn't feel heavy at all. As soon as I blew it, I noticed a massive difference. Firstly, it was baby soft! It was like different hair. Second, it made blowing my hair ten times quicker, and my hair didn't get as puffy as it normally did. I didn't even need to iron it, but I did, mainly because I wanted it to last at least 3 days (to minimize heat use). The only 'bad' thing about this is that it smells a little like soap, but its very faint. To people wondering if this protects hair from heat, it doesn't. It's a treatment, not a heat protectant - I used a heat spray after blowing/before ironing. This works great in humidity, terrible in rain (duh). The longest I've gone without washing it out was 5 days, and I only needed to touch up the ends once, but beware of oily hair *-* I use this now twice a week, and it works amazing. If your hair starts to feel greasy after a few uses, it's normal! Keratin is a great protein for hair, but too much can weigh down hair, especially fine hair, so make sure to incorporate a clarifying shampoo into your routine. ~PRODUCTS I USE: Shampoo - giovanni tea tree triple treat shampoo (clarifies and removes buildup) // Conditioner - aussie miracles moist 3 minute deep conditioner // Heat Protector - tresemme heat tamer spray // Leave-in Conditioner - garnier fructis curl air dry cream
...
show more
Reviewed in the United States on April 7, 2022 by S.N.
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
I am so impressed with the CHI Keratin K-Trix 5. After just one use, my hair felt incredibly smooth, soft, and much easier to manage. It really helps to lock in moisture and reduce frizz, leaving my hair looking shiny and healthy all day. I love that it protects my hair from heat styling too, which makes a huge difference in keeping it strong and damage-free. This product is definitely a must-have for anyone who wants salon-like results at home. Highly recommend!
...
show more
Reviewed in the United States on October 1, 2025 by Amanda Thalia Garcia Osoria
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
This works really well, I will buy it again. It must be heat activated so good for blow drying and flat ironing
Reviewed in the United States on July 3, 2025 by Sophia walcott
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
I didnt have a lot of faith in this because I have tried so many products and salon treatments but they always left me wanting for more. So when i tried this, i actually did it right before sleep, like an after thought. I was immediately pleasantly surprised by its scent. It smelled rich and sweet. I got a kittle worried as i was blow drying. It didnt seem to have any difference from how it feels blowdrying with my other products. Per product instruction, it is activated by flat irons. And immediately as I started ironing, my hair softened. It straightened quick with just 1 glide. My hair is thin so it didnt take long. It was shiny and flowy and my fingers went through it like cutting butter. But It was late and i had to sleep. I thought it was going to go back to being stringy and dry by the next day (coz thats how my hair usually is after sleep). It is the next day AND it feels and looks soft and shiny still. I am so impressed. I will buy again for sure. Ill update this review after 5 days to see if thats as long as it lasts (as it says on the bottle).
...
show more
Reviewed in the United States on June 18, 2020 by Leizel tupaz
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
Excellent hair serum
Reviewed in the United States on April 3, 2026 by Sharon Dube
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
This treatment works well. It smooths without weighing down my fine hair. The scent, however, is overwhelming. It’s not that it’s bad, it’s just really strong. It’s so bad that it gave me the worst headache. I used it at night and I couldn’t sleep because of the pain, and pain relievers did nothing for it. I ended up washing it out just to get some relief. I’ll gladly go back to the stuff I was using before. It’s twice the price, but no smell.
...
show more
Reviewed in the United States on September 22, 2020 by MmeDita
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
The CHI Keratin K-Trix 5 Smoothing Treatment works exactly as promised. It leaves my hair soft, smooth, and noticeably shinier, with a healthy look that lasts for days. It also tames frizz without weighing my hair down or making it greasy. I love that it protects against heat styling while repairing damage at the same time. My hair feels stronger and more manageable after each use, and a little goes a long way. If you’re looking for a salon-quality smoothing treatment you can use at home, this one is a winner.
...
show more
Reviewed in the United States on August 11, 2025 by Matt
Style: Smoothing Treatment
Size: 3.92 Fl Oz (Pack of 1)
I’m very impressed with this product! The price is amazing and it really does smooth and help straighten my hair, although I’m not sure if it really lasts five shampoos. I have extremely curly, very frizz-prone fine, thin hair that almost no product can make look smooth and sleek especially during these hot, humid summers in Georgia, except for this. Now, I have not used a flat iron with this as I try to avoid using direct heat on my hair because it is easily damaged. The way that I use it is as follows: I apply a generous amount to damp hair after shampooing and conditioning with the Chi Keratin Shampoo and Conditioner. Then I comb the treatment through to evenly distribute it and roller set my hair. I sit under the dryer on the warm (not hot) setting until my hair is 100% dry and then remove the rollers and apply a shine serum to my hair as I separate and rake through the curls. My hair is elongated, incredibly soft and very smooth unlike with any other product that I’ve used and it holds up to the humidity better than it usually does without the product even though it’s not perfect. i would think that you would get even better results with the use of a flat iron as the heat from it is supposed to seal in the treatment, but for me the risk of heat damage is not worth it so I’ll just stick to my method, which seems to be working great for me.
...
show more
Reviewed in the United States on July 2, 2021 by LaDawn Craft Parrish