Designer Collection Thermal Serum with Argan Oil, 4.2 Oz, Alcohol-Free, Heat Protection and Shine, Frizz Eliminator, Great for Conditioning and Incredible Shine

Rusk serum is excellent. You only need a couple of drops to smooth flyaways and it keeps your hair shiny and bouncy. I love it.

Really like this. Makes your hair smooth.

The main reason why I decided to stick with this protectant was because I was impressed with the smell. It has a very light cucumber smell that disappears soon after applying. I really can't stand sweet, cocoa, vanilla, cupcake scents in hair products. I was so happy I found this product! The product works very well. I love the serum consistency. My hair has less breakage. Great product! That being said...I'm worried what the new signature scent will be be. I hope I don't have to go searching for another heat protectant.

I purchased after observing my hair stylist use this on my hair before blow-drying. The results were fantastic - changed my texture - making hair shiny, flowing, and smooth. The price here was about 1/2 of what my salon was selling for and the 4.2 oz bottle will probably last me for a year as only a few drops are required for each application. Only down-side is the product has a slightly unpleasant odor, like cabbage, out of the bottle. However, it goes away after applying to hair and completing drying and styling. I plan to purchase again as this is best de-frizz, straighten, style serum product I have tried. Thanks, Rusk!

Works great for my hair. I read some comments about the smell. I actually like the smell, however it does go away once it's dry. Lightweight and doesn't leave my hair greasy. I have oily hair and I love this product!

I purchased this to use on my hair for flat ironing. When I got it I smelled it and I did not like the smell and I immediately requested to return. Well, I washed my hair and the other 2 heat protectants I got just make my hair feel like straw so I said well let me just try the Rusk serum. WOW I LOVE IT. My hair feels SO SOFT. I LOVE IT. The scent goes away after using it with the heat. I am so happy I decided to give it a try. I canceled my request to return it. THIS IS A KEEPER.

The RUSK Designer Collection Thermal Serum is a wonderful product that I can't live without when using my flat iron. Never disappointed in this product. However, when I opened the envelope and reached in for the bottle of RUSK, it was gooey all over. The bottle was barely closed and in fact not closed at all but I think that plastic tab that fits all the tops is what saved the day. After I washed the product off the bottle and held it up to the light to see how much product was left, I was surprised that only a small amount had leaked out of the bottle. I'm okay with this. Now with that behide me, I do want to say that I never have a bathroom cabinet empty of this product. It's excellent in every way and I do recommend it highly. I leaves my hair shiny and beautiful. What more could a girl want.

Love this stuff been using for years always keeps frizz away and protects from over heating.

This is my 2nd bottle and I love this stuff!!

A really great product to use with hair straightener. Have never suffered from split ends using this product. Frizzy hair is soft and silky. Have been using it for a few years now, was unable to find it at my local hairdressing suppliers lately, never thought amazon would sell it, thank god they do. Having to pay twice the price is worth it.

Es un producto muy bueno de alta calidad y cumplió con todas mis expectativas , gracias

J'utilise ce produit depuis des années c'est très efficace avant de se servir d'un séchoir ou d'un fer à lisser les cheveux sont super doux et brillant on peut mettre ce sérum le matin sur cheveux secs et procéder à son brushing et ça c'est vraiment très pratique je le recommande à 100%

I love this serum for my slightly curly hair. It tames the frizz and gives the curls a soft bounce without feeling greasy. I thought it had been discontinued as I haven’t been able to find it for ages and then up it popped in a new look bottle 🙂