I have been doing keratin smoothing treatments since they first came out and many refer to me as the "Keratin King." I have also been the Director of Education for multiple major keratin brands. Unfortunately, I began to suffer medically from the effects of formaldehyde, so I refused to do them any longer. The great news is that I discovered S4 and it has been a complete game changer. Not only does S4 have no formaldehyde or produce any fumes, it's so much easier and faster to do and the results last as long or longer — and I'm making just as much $ as ever. My clients really like the results, and they keep on coming back for more. The quality of the hair is amazing after the S4 treatments. Now we all can get all the wonderful benefits of keratin smoothing without the risks! LOVE S4!
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Henri Borday
Master Stylist, Mizu Salon, NYC

This is by far the best Keratin treatment that I’ve ever used, hands down!

Nancy J
Shear Attitude, Newport Beach, CA

I’ve served in this industry for over 50 years from the NE (mostly MD) to CA and now to South Florida, working with many manufacturers during my career as a professional stylist and salon owner. Throughout my tenure, I have never liked working with products containing formaldehyde or sodium hydroxide. In addition to these ingredients damaging and splitting the cuticle, (which will eventually work its way to the center of the medulla), the ill health effects are legendary. Result — not healthy for client or stylist & therefore, not an attractive solution.

But this amazing breakthrough in the industry with the S4 treatment has changed the venue totally. It is a fabulous Frizz Buster which leaves the hair with a silky, shiny, natural appearance. All my clients, no matter what the texture of their hair, find that S4 has met & exceeded expectations.

The application of S4 is simple, easy and produces fabulous results in less than an hour. All 3 formulas cover every client’s hair texture, so my clients are extremely pleased — and the price is right! The great news is that there are no nasty fumes, and the results are fantastic. You can also style & color immediately after application which is a win-win for everyone.

I am thoroughly impressed with all aspects of this product. In my opinion, S4 is a fashion forward breakthrough in the chemical services venue.
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Joseph Amato
Master Design Artist, South Florida
National Haircutting Champion
Former Instructor at International Academy Hair Design
Salon Owner
Regional Design Artist for Sebastian
Rusk Master Design Artist

I just used the Exteme formula on my friend and WOW. Just the whole process, less time, easy application, NO FUMES (I have asthma) during blowdry or flatironing, the hair is silky, shiny! But not stick straight!!! Thank you for all your help. Cant wait to really get this going.

Heather R.
Hair Loft on Linden, Pinehurst, NC

The products are excellent. I use them in my salon and have great results.

Ruth F.
Beautifully Inspired Hair Studio, Woonsocket, RI

Thank you! I am going to do a smoothing treatment on myself soon. I have however sold out of the 6 retail size styling cremes already! That product is FANTASTIC!

Tish F.
Sylver Salon, Bariboo, WI

As a high end Bridal and Celebrity Stylist, my clients' hair must be in the best condition prior to styling. I’m a perfectionist! I have tried every keratin smoothing treatment out there and S4 is my absolute favorite! Not only is it really fast and easy to do, but the results are astonishing and there are no fumes. The hair feels fantastic, looks so much healthier, and lasts longer than any other smoothing treatment I have tried. I am an advocate for healthy products and ingredients and S4 provides no risk to me or my clients. They have a few different options to choose from with different end results, so there's something for everyone. Trust me, I wouldn't DARE do this on my clients if it wasn't the best. Thank you S4!
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Lauren Decosimo
Pinned and Proper, NYC​

Thank you S4 for giving us stylists this awesome and SAFE line of keratin smoothing treatments at such great prices. I have been doing high end clients for many years as well as specializing in brides and their wedding parties and my clients come to me because of my attention to detail and my love for them and the health and beauty of their hair. Especially in these crazy times with the virus, my clients don't want to spend hours in the chair so this has been such a wonderful new product line that gives them incredible results, plus I can do the treatment the same day as I do their color which is HUGE. It truly works better than other smoothing treatments I've used in the past and my clients are thrilled and happy with the results and the condition of their hair. Also, the Styling Creme they offer is THE BOMB. So pleased with the entire line.
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Joy Fields
All About Joy, Palm Desert, CA

Just tried this product and it is amazing...great results!
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Sandra A
Arlington, VA

I’ve been a salon owner for 15 years. I deal with a lot of people of different ethnic backgrounds. I came across your product even though I’ve used countless others, none of them offered the ease of your product. I do lots of treatments for people with different textures and I have to say my clients I’ve used this on absolutely love it!!!

Louis Rodriguez
Do or Dye Hair Salon, Chicago, IL

My client had very frizzy hair from cancer treatments – then colored on top of Infinity. Thank you for your advice. We were both very happy. Love how the hair feels!

Denise G.
Bon Cheveux, Marmor, NJ

All my clients who were used to Brazilian blowouts/keratin love the new smoothing treatment. I needed to order more for my personal use since my families and friends love it also!

Masako I.
SalonMONTE, Alexandria, VA

I can’t tell you how thrilled I am about your product!!! We all love it! I definitely want to reorder a bigger amount now. Would you be kind enough to send me a purchase order form? FYI, I’ve told all my colleagues....🥰 Thank you, awesome product!

Sandy M.
Independent Stylist, Houston, TX

We are passionate about this smoothing system. Immediately the hair is incredibly beautiful, shiny, manageable and SMOOTH. Our clients experience the FULL MONTE hair care service on their visit to the salon as well as home care support products. Our team is excited that this SMOOTHING system has NO Odor, Minimal time to apply, able to apply color to the hair immediately after the service. We are thrilled to receive any and all education available. Many thanks.
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Sharon F.
Director, SalonMONTE, Alexandria, VA

Did this service yesterday on a client. UNBELIEVABLE. Highly recommend 💕
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Kimberly H.
50 Shades of Beauty, W. Vallet, UT

I am obsessed with this keratin product. So glad I found this on Instagram. Firstly, I can’t believe this was on my doorstep within two days! Amazing! Secondly, it was extremely easy to do. I will continue to order this again and again and again. Thank you for an amazing product!

- CK

I am an independent stylist out of Fairfield County CT! I have been using S4 since January 2021 and each time I use it I fall more in love with this product!! Never have I ever felt so confident using a product on over processed blonde hair! But the Infinity has zero smell and leaves the hair softer and smoother than any other keratin I have ever used in my 13 years in the business! This customer has cystic fibrosis, and she was always concerned with the fumes that come with traditional keratin treatments but with S4 her and myself have such peace of mind our lungs are safe! Obsessed to say the least! I am so excited to be a part of your S4 family! You guys are changing the game! Thank you!!

Dani R.
Hair & More by Dani, Trumbull, CT
(ig@hairandmorebydanict)

Hi, so I tried this new product and I LOVE it and the conditioner smells sooo good.

Mary Jo E.
Medeiros Spa & Salon, Hanford, CA