--- product_id: 13000165 title: "RUSK Thermal Serum - Heat Protectant Treatment for Frizz Control - Smoothing with Added Shine, Moisture & Cuticle Sealing - Lightweight Anti-Humidity Hair Serum (4 oz)" brand: "rusk" price: "$42.74" currency: USD in_stock: true reviews_count: 13 category: "Rusk" url: https://www.desertcart.us/products/13000165-rusk-thermal-serum-heat-protectant-treatment-for-frizz-control-smoothing store_origin: US region: United States of America --- # Lightweight shine boost Moisture-locking formula Heat protectant power RUSK Thermal Serum - Heat Protectant Treatment for Frizz Control - Smoothing with Added Shine, Moisture & Cuticle Sealing - Lightweight Anti-Humidity Hair Serum (4 oz) **Brand:** rusk **Price:** $42.74 **Availability:** ✅ In Stock ## Summary > 🔥 Elevate your hair game with heat-protected, frizz-free shine! ## Quick Answers - **What is this?** RUSK Thermal Serum - Heat Protectant Treatment for Frizz Control - Smoothing with Added Shine, Moisture & Cuticle Sealing - Lightweight Anti-Humidity Hair Serum (4 oz) by rusk - **How much does it cost?** $42.74 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/13000165-rusk-thermal-serum-heat-protectant-treatment-for-frizz-control-smoothing) ## Best For - rusk enthusiasts ## Why This Product - Trusted rusk brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Humidity Defense:** Lightweight anti-humidity serum that keeps your style sleek and frizz-free no matter the weather. - • **Weightless Radiance:** Delivers high-gloss shine without buildup or heaviness—perfect for effortless, natural movement. - • **Frizz-Free Confidence:** Seals cuticles and smooths hair texture for a polished, salon-quality finish every day. - • **Heat Shield Technology:** Protects strands from heat damage during styling, preserving hair health and promoting growth. - • **Trusted Pro-Grade Formula:** From a leading salon brand, designed for color-treated and chemically treated hair with vegan, alcohol-free ingredients. ## Overview RUSK Thermal Serum is a lightweight, professional-grade heat protectant designed to smooth frizz, seal cuticles, and boost shine without weighing hair down. Ideal for all hair types, especially color-treated or chemically treated hair, it locks in moisture and defends against humidity while promoting healthier, longer hair with consistent use. ## Description Product Description RUSK Designer Collection Thermal Serum with Argan Oil, 4.2 fl. oz. Perfect for color treated hair or chemically treated hair Brand Story RUSK is one of the premier salon brnads in the world, a brand that taps into contemporary life, to how people want to look & what they want to use on their hair Review: Rusk hair - Keeps hair looking healthy and shiny. The ease of a small dallop and run through hair ends is easy. It last a long time. Review: Possibly new favorite UPDATE - Ok so here goes. I have thin,curly, damaged hair. Basically the worst. It’s hard for me to want to use heat protectant when it makes my hair look dirty or oily. I’ve been shopping around trying different things, and as of 2-3 weeks I’ve been using this product. So it looks thick and like omg your hair is gonna be greasy but surprisingly it’s not !! I put very little (dime size amount) in my palms and spread it through my wet clean hair a couple times. Might be easy to put too much so start off w little then repeat process as needed. Smell is nice, somewhat familiar. It helps my hair look less damaged, helps keep my hair straight, gives my hair some weight, and my hair is growing!! Like I def see some growth prob from being so well protected! Def worth a try. UPDATE. 6months later and I’m still using this. My hair has def grown and is being protected from heat !! Def will be buying another bottle soon. UPDATE 2/25/22 Been using this since 10/10/20. Works well with other products without feeling greasy ! So you go girl and take care of that hair ! Literally putting this and like 4 other products in my hair including oils/ serums. Hair is shiny and longer than ever. Who knew putting time and effort in your hair would make it healthier and just better lol. Some of us gotta work for some things right! Worth it. UPDATE 03/30/23 Still using this after every shower. I try new products regularly but this one is always my last step !! ## Features - Sleek Finish Essential - This concentrated thermal serum smooths hair texture, seals the cuticle, and eliminates frizz while enhancing shine for a polished, salon-quality finish across all hair types. - Cuticle-Sealing Technology - Designed to lock in moisture and smooth the hair surface, this formula helps reduce roughness and improve light reflection for visibly shinier, healthier-looking hair. - Lightweight Shine Boost - Delivers incredible shine without buildup or heaviness, making it ideal for daily styling routines where smoothness, movement, and softness are key. - Effortless Styling Control - Apply a small amount to damp or dry hair before heat styling to protect strands, reduce frizz, and create a sleek, controlled finish with lasting smoothness. - Trusted Professional Brand - Known for performance-driven styling solutions, RUSK delivers salon-quality results with innovative formulas designed to elevate everyday hair routines. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0017RD0KW | | Best Sellers Rank | #38,978 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #110 in Hair Styling Serums | | Brand Name | RUSK | | Customer Reviews | 4.5 out of 5 stars 2,201 Reviews | | Global Trade Identification Number | 00611186040669 | | Hair Type | Straight | | Item Form | serum | | Item Volume | 1 Fluid Ounces | | Item Weight | 0.14 Kilograms | | Liquid Volume | 4.2 Fluid Ounces | | Manufacturer | RUSK | | Material Type Free | Alcohol Free | | Number of Items | 1 | | Product Benefits | Smooths frizz, seals cuticle, and delivers high-gloss shine with heat protection. | | Scent | Sulfate Free, Paraben Free, Alcohol Free & Vegan | | Scent Name | Sulfate Free, Paraben Free, Alcohol Free & Vegan | | UPC | 611186040669 | | Unit Count | 8.00 Fluid Ounces | ## Product Details - **Hair Type:** Straight - **Liquid Volume:** 4.2 Fluid Ounces - **Material Type Free:** Alcohol Free - **Product Benefits:** Smooths frizz, seals cuticle, and delivers high-gloss shine with heat protection. - **Scent:** Sulfate Free, Paraben Free, Alcohol Free & Vegan ## Images ![RUSK Thermal Serum - Heat Protectant Treatment for Frizz Control - Smoothing with Added Shine, Moisture & Cuticle Sealing - Lightweight Anti-Humidity Hair Serum (4 oz) - Image 1](https://m.media-amazon.com/images/I/41xrdfThkeL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Rusk hair *by S***E on April 5, 2026* Keeps hair looking healthy and shiny. The ease of a small dallop and run through hair ends is easy. It last a long time. ### ⭐⭐⭐⭐⭐ Possibly new favorite UPDATE *by C***Y on October 10, 2020* Ok so here goes. I have thin,curly, damaged hair. Basically the worst. It’s hard for me to want to use heat protectant when it makes my hair look dirty or oily. I’ve been shopping around trying different things, and as of 2-3 weeks I’ve been using this product. So it looks thick and like omg your hair is gonna be greasy but surprisingly it’s not !! I put very little (dime size amount) in my palms and spread it through my wet clean hair a couple times. Might be easy to put too much so start off w little then repeat process as needed. Smell is nice, somewhat familiar. It helps my hair look less damaged, helps keep my hair straight, gives my hair some weight, and my hair is growing!! Like I def see some growth prob from being so well protected! Def worth a try. UPDATE. 6months later and I’m still using this. My hair has def grown and is being protected from heat !! Def will be buying another bottle soon. UPDATE 2/25/22 Been using this since 10/10/20. Works well with other products without feeling greasy ! So you go girl and take care of that hair ! Literally putting this and like 4 other products in my hair including oils/ serums. Hair is shiny and longer than ever. Who knew putting time and effort in your hair would make it healthier and just better lol. Some of us gotta work for some things right! Worth it. UPDATE 03/30/23 Still using this after every shower. I try new products regularly but this one is always my last step !! ### ⭐⭐⭐⭐⭐ Meet the last serum you will ever buy… *by K***E on July 18, 2025* 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. ## Frequently Bought Together - Rusk Thermal Serum for Unisex 4.2 Oz Serum - Wired by Rusk for Unisex - 6 oz Crème IRAWRDP6 - Design Essentials Deep Moisture Milk Souffle For Dull, Dry & Thirsty Hair - Coconut & Monoi Collection - 12 Oz --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/13000165-rusk-thermal-serum-heat-protectant-treatment-for-frizz-control-smoothing](https://www.desertcart.us/products/13000165-rusk-thermal-serum-heat-protectant-treatment-for-frizz-control-smoothing) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-18*