RUSK Designer Collection Thermal Serum with Argan Oil, Alcohol-Free Conditioning Serum, Heat Protection and Shine, Frizz Eliminator, 4.2 oz

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.

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!

If you have thick curly hard to straighten hair, this is the best! I apply after a towel dry, before I blow it dry, then flat iron Makes my hair super shiny, and silky straight. Use about a quarter size in my palm I have been using this for 15+ years. !

Works well with my thin hair.

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

A little goes a long way it helps keep my frizz down and smells wonderful.

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.

This is the best serum I’ve found for my fine curly and sometimes frizz prone hair. This is great alone for a blowout, or used before gel for a scrunch and style curly look. I’ve tried many brands over 25 years and I keep coming back to this one. This and Str8 by the same brand are both fantastic products.

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.

Me gusto mucho, me quita el frizz y me da mucho brillo al cabello aparte que lo protege del calor

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've used the thermal serum for several years, because it gives the best protection against using heat on your hair. Other products leave my hair feeling dry or don't actually protect it from the heat. Only the smell of the thermal serum good be a little more attractive (though it isn't a bad smell, just neutral). Rusk is a little more expensive, but definitely worth the money!