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Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free)


Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free) - Normal / Tinted formula 

item# : 7884-normal-tinted-formula


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Option : Normal / Tinted formula
  • Option : Normal / Tinted formula
  • Option : Resistant / Virgin formula
  • Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free) - Normal / Tinted formula

    Option : Normal / Tinted formula / $58.99

  • Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free) - Resistant / Virgin formula

    Option : Resistant / Virgin formula / $58.99

Rusk Thermal Shiny Str8 - Permanent Straightener is a formaldehyde-free, intensive reconditioning therapy system. Also known as the "Japanese Straightening" or "Thermal Reconditioning" system, the Rusk Thermal Str8 Internal Restructing System permanently straightens excessively curly or wavy hair while leaving it in optimum condition.

Most straightening products use harsh chemicals, which can leave the hair dry and lifeless. Less caustic products fail to straighten the hair permanently. Rusk Thermal Str8 is a unique approach, which provides internal conditioning and beneficial protection through its combination of Vitamin B5, Soy Proteins, Wheat Proteins and Keratin Amino Acids. The Rusk Thermal Str8 system is then used with the Rusk Ceramic Str8 Iron, resulting in permanently straightened hair that is smooth, shiny and healthy.

Rusk Thermal Str8 provides straight, shiny, healthy hair . Designed to be used with the Rusk Ceramic Str8 iron, this system uses Vitamin B5, Soy Protein and Keratin Amino Acids to prepare the hair for superior, permanent straightening results. This breakthrough formula contains Thermplex: a unique combination of ingredients, which, when heat-activated, will "Internally Restructure" hair from the inside out. This system straightens and conditions the hair, imparting a new, smoother texture.

Rusk Thermal Str8 Internal Restructuring System is available in 2 formulas:

  • Normal / Tinted formula: For use on healthy, virgin hair or hair previously colored with semi or demi permanent hair colors, processed with less than 20 volume peroxide.
  • Virgin / Resistant formula: For use on coarse, resistant virgin hair, or resistant hair that has been color-treated using semi permanent, demi permanent or no-lift permanent hair color.


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Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free)
4 Stars based on 37 Review(s)
Changed my life
June 2, 2017
I have always has super frizzy and curly hair. I got made fun of for having a white girl afro. Blowouts, serums, deep conditioning...I tried everything. Nothing smoothed my hair until my hairdresser recommended this. After several years of having these done, my hair seems to stay smoother and I get keratin treatments instead. I do still love the rusk though. I'm honestly perplexed by ppl who said it doesn't work.
Leave hair shiny Hair feels softer My hair grew quicker
Time consuming process Smells strong

4 Stars
I would recommend this item to a friend.

Did not like it
May 25, 2017
I asked my hairdresser for a keratin treatment and she used this on my hair. Now it looks like i put relaxer which is what i was desperately trying to avoid. She said that it cannot be done right after putting colour in so i had to wait two weeks. Two weeks later i did it and then she said to me that this strips the colour from your hair. I had a red and it changed to brown after this was used whuch she should have advised before taking my money for the colour. Other keratin products lock in colour and gives it shine. I wish i was properly informed because this is NOT a keratin treatment. You have to be very careful and make sure the hairdressers themselves know about the products for the result you want. I give it zero stars but since you must click in the field i just presses one.

4 Stars

Didn't work!
October 23, 2016
I had this done at my salon. My hairdresser said it was recommended for color treated hair. I figured it would be ok because it was formaldehyde free. I waited 72 hours to wash it and after it looks almost the same as before. It actually feels coarse and dry and takes longer to dry and style! I haven't let it dry naturally yet, I have wavy hair that can get a bit frizzy at times. I was expecting this to be similar to my last keratin treatment. Last time I had my hair keratin straightened, she used a CHI product. It made my hair super straight and shiny, but it smelled awful for a week and it made my hair shades lighter. After a week I was able color again and my hair was SO smooth and dried in minutes. I am so disappointed in this product and am afraid to try another straightener for fear it will damage my hair. So angry and frustrated and this cost me over $300!
Didn't work, left hair dry and coarse, no shine, now when I style hair looks lifeless and damaged. Do not use this product!

4 Stars

For Tinted Hair - Amazing result
August 22, 2016
Had this done a few years ago, absolutely chuffed to bits, amazing outcome. Can wash my hair and leave it, or dry it, it's superb. It lasted 'nine' months the first time. Now struggling to source this amazing product in the UK. Absolutely gutted I'm struggling to find it.
Brilliant results
Sitting in salon for four hours

Vikki Everett
Essex, England
4 Stars
I would recommend this item to a friend.

Like it
August 3, 2016
Good product but use with knowledge

Kissimmee, FL
4 Stars
I would recommend this item to a friend.

Severely Damaged Hair
May 11, 2016
I had this treatment done on April 18, 2016 .. never has my hair been damaged until now. To say that I am sick over this is putting it mildly. I have very wavy hair and had both the Keratin and Brazilian treatments done in the past with beautiful results. I typically have it straightened every 7 to 8 months. Enter new salon, new hairdresser. This product was used without my knowledge (evan after asking 3 times which product is being used) ... I trusted the stylist knew what she was doing. The process was a disaster .. my hair is more unruly now than ever, feels like there is sand in it, and severely damaged. It takes me over an hour (the length is just below my neck) to dry and straighten as well as using at least 5 different styling products. With the Keratin and Brazilian treatments, it literally took me 15 minutes to do my hair with silky, smooth results (and no products needed). I am consulting with another styllst (different salon) as to what my options are regarding the damage to my hair.

Gilbert, AZ
4 Stars

Did not straighten my wavy hair
March 19, 2016
I typically have my hair straightened with a different product every 9 months. After washing, I can let it air dry, without using any heat it is straight and shiny. This time, I went to a new place and the hairdresser used the Rusk Str8 system. By day 2 after the treatment some of my wave was returning. I waited 4 days to wash - and my hair has the same wave on the regrowth as it did before the treatment, but now my hair feels processed and is dry, heavy and coarse. This did not straighten my hair and left it damaged. My hairdresser claimed she had taught classes on straightening systems, and it was the product, not her iron or technique. I spent 5 hours, $500 to have my hair tugged on and damaged. I am afraid to have it redone with any other product now.
Left my hair damaged without any straightening

4 Stars

Did not straighten my wavy hair
March 19, 2016
I typically have my hair straightened every 9 months. I went to a new place and the hairdresser used the Rusk Str8 system. By day 2 after the treatment some of my wave was returning. I waited 4 days to wash - and my hair has the same wave on the regrowth, but now my hair feels processed and is dry, heavy and coarse. This did not straighten my hair, and left it damaged. My hairdresser claimed she had taught classes on straightening systems, and it was the product, not her iron or technique. I am afraid to have it redone with any other product now.

4 Stars

Changed my life
January 28, 2015
I have thick, coarse, spiral curly hair. I've been using this product for the last 5 years. It makes my hair softer, smoother and cuts down straightening time by an hour or more. My hair is slightly wavy after using it.

amarillo, texas
4 Stars
I would recommend this item to a friend.

Careful, This product does contain a 'relaxer' chemical....
October 18, 2013
I decided to have this process performed on my daughters thick, curly, ethnic hair. Her hair had become such a problem to do, since I stopped putting relaxer in it. My friend recommended the product. Her sister is a stylist and put it in my friends children hair as well as her own. Problem, they insisted there was no relaxer in the product. So I agreed. After she washed my daughters hair and started applying the product, I smelled the distinct smell of relaxer! I told her, Hey, that's relaxer, she insisted it was not, that it was a keratin treatment. No, I told her to give me the box. First ingredient, ammonium thioglycolate. This is whats used in Jheri Curls, Wave Nouveau, Affirm, etc. I was soo upset. I'm a Chemistry Graduate, I know perm when I smell it. Anyway, then she was leaving it on for what seemed to me a long time. She said it could stay on indefinitely. Wrong, I know better. I told her to wash it out after 15min! OK, so she continued the process, and my daughters hair did come out beautiful. It was shiny and bone straight. I dont think even the Dominican round brush could have done a better job. But I knew better not to be too elated. Because with the time she left the thio on her hair and the fact I know my daughters hair really doesnt do well with chemicals, time would be the true deciding factor. It has been 3 months now, and I have noticed breakage in my daughters hair. Not much and in hidden areas, but those first couple of weeks I was sweeping alot of hair off the floor. I try to keep it moisturized ( remember, Thio must be moist!! or it dries out your hair and will make it dull and brittle) but it is dry still. Her hair grows extremely fast and now it really looks like she could use another visit. But I was told they dont do a touch up, they just do they whole process all over again. Not sure if I want that now...Maybe I'll wait another couple of months.
Definitely Shiny and Bone Straight after initial process. Maintenance of my daughters hair is 100% easier and less time consuming.
Although there may not be any Formaldehyde, There is Ammonium Thioglycolate (perm/relaxer) Pick your poison

4 Stars
I would recommend this item to a friend.

August 15, 2013
Worked really well on ethnic hair. My daughter has very tight curls when her hair is wet. After having it professionally done, her hair looks great. Its straight from the roots to the ends. She loves it!
everything. A little expensive to have it professionally done ($220). Just waiting to see how long it last
Does smell bad. Even leaves a little smell after its finally done

philadelphia pa
4 Stars
I would recommend this item to a friend.

Impressed - really did the job
July 3, 2013
First product was major fail, so my hairdresser used this on me. I am thrilled! I have pretty curly hair and definite frizz in the humidity. After this product, my hair is super soft and it really did straighten most of my hair. The back is a bit curly and some of the ends have a flip but a quick use of the blow dryer took care of that. No more spending all that time in the heat styling/straightening just to have it frizz up when I walked outside! Everyone's hair is different, but I'd say this worked better than my Coppola Keratin treatment. Only down side is it does smell a bit like perm for a couple of days but having washed twice, it's perfect! Love, Love this product!
Super smooth hair, no goo left on for days, worked perfectly on my color-treated hair
A bit smelly, process still takes about 2 hours, no washing for 48 hours - but that's normal for this type of process

4 Stars
I would recommend this item to a friend.

I have this can I use it on dyed hair
June 27, 2013
I dye my hair brown with a 20 vol developer last time I did it will this hurt the strighting proce ss I have no instruction
Love silky hair
Afraid it will fall out

Heather Reed
hiram, ga
4 Stars
I would recommend this item to a friend.

Product is crap!
April 14, 2013
I am 35 yrs old and have used everything and this is the worst straightner I have ever used and was charged 200 dollars for something that made my hair look worse than it did before. My hair looked better before I put the str8 on my hair. Ands yes I did exactly what I was supose to do and waited until I was told to wash it.
It took the curls out but left my hair dry and lifeless.
Don't do it not worth the money. My hair was beautiful before I used the straightener, now it's just fried.

Nashville tn
4 Stars

Great Product!
December 4, 2012
I've used several products to relax my hair and this is by far the best. My hair is straighter and looks healthier with minimal care after processing.
A little pricey!

South Georgia
4 Stars
I would recommend this item to a friend.

Did not work
November 6, 2012
Went to salon for daughter's semi wavy/frizzy hair. Just washed after the 72 hour wait. Hair is only slightly smoother. However, there is still the same amount of frizz. She is very disappointed. I'm disappointed for the amount we spent and the disappointing results. Should have considered the Japanese treatment instead.

Disappointed mom
Columbus, ohio
4 Stars

September 24, 2012

4 Stars
I would recommend this item to a friend.

Great product for the money!
July 7, 2012
Awesome! I have the curliest and thickest hair and this product works great.

Fall River, Ma
4 Stars
I would recommend this item to a friend.

Great Product
March 9, 2012
I have borderline ethnic hair. Rusk Thermal Shiny Str8 really does a good job straightening my hair/new growth. I have been using for a few years now and have never had any issues. It is fairly easy to use with the help of another person. It takes me about 2 - 2 1/2 hours from start to finish. After trying a million other straighteners over the years, this one has done the best job of taming my kinky curly, frizzy hair.

De Pere, WI
4 Stars
I would recommend this item to a friend.

Rusk Thermal Str8 Permanent Straightener - Experience
February 23, 2012
I just had this done this past Sunday (February 18), and my 72 hours was up just yesterday. After I washed my hair, I was not very pleased with the results. I used to have silky and shiny hair - it was just VERY curly and thick. Now, it feels even thicker, and all of my shine and silkiness is gone! Even after I get out of the shower, it's so hard to even brush it. I don't know if it's because this is still pretty fresh - but I really hope my hair can come back to life. I got a chemical relaxer done about 3 years ago - and my hair feels the same as the relaxer made it feel. Something tells me there are actually a lot more chemicals in this product then they try to make it out to be. Anyone else have this issue? Did it get solved over time? It sucks because I love having straight hair - I just think my straight hair looked better when I took 2 hours to straighten it when it was naturally curly. Now it just looks like a frizzy mess with way too much volume.
It straightened my hair decently well.
Did NOT leave it silky and smooth like promised. I expected a lot more than this. Also, the smell is not as bad as people make it out to be. It smells like anything permanent that people put in their hair.

4 Stars
I would recommend this item to a friend.

Used 10 times since 2003
July 31, 2011
I have very coarse, wiry, tightly curled hair. I had this straigthening method first done in 2003 and continue to have every 8 to 9 months on average (depending on the season for humidity). My stylist encouraged me to try the Brazilian Keratin Treatment instead in 5/11 and it didn't last 2 months. You need to make sure the person doing it flat irons the hair twice (from root to end) and that you don't sweat, get your hair wet, use clips, etc. for 72 hours. It is worth the wait!! Also if your stylist will turn the ends of the hair under during the second flat iron session, the hair won't look like the end of a broom. I highly recommend this!!
results are permanent; lasts for 7 to 9 months; hair feels smooth and is shiny
smells bad and it is expensive if you use someone very skilled in the process (ex. $100 hour) and mine takes 6 hours

4 Stars
I would recommend this item to a friend.

April 16, 2011
This is my third time using Rusk Thermal Straightner, and I must say I just finished the process my hair feels great.
It really works

Oakforest Illinois
4 Stars
I would recommend this item to a friend.

Love this stuff!
February 24, 2011
I decided almost a year ago to have my hair straightened. I got my hairdresser to purchase a product for me, and she chose the Rusk Str8 Straightener. The results from this were amazing! I have coarse, thick, medium-length hair that is moderately wavy (and not the pretty wavy). It took almost 4 hours to process it. I can now just wash my hair and let it dry on it's own if I want to. My hair grows fairly quickly, but I was able to go for 9 months before I had to re-straighten it. Next time I'll probably have it done after 7-8 months because it had grown out about 6 inches although it still looked pretty good. The smell is bad, but the results are great!
Formaldehyde-free, doesn't seem to be so harsh, straightens very well
The smell is awful!

4 Stars
I would recommend this item to a friend.

saves me 1hr and 45min
December 29, 2010
It used to take me 1hr 45 min to do my hair thats just the blow drying + straighting iron, I could never wash and wear that was unheared of. This product is amazin! but make sure you have a good quality Iron! you won't be sorry when you buy this. you'll be simply amazed!
the time you'll save in blow drying and straighting,
none! results are too amazing

4 Stars
I would recommend this item to a friend.

Save yourself some money
June 11, 2010
The past two years I've had the Rusk Thermal Str8 process done by a professional hairsalon, which cost me up to 380 USD per treatment. I have frizzy afro curls, but this treatment leaves my hair silky soft, straight and healthy looking. I was a little hestitant trying to do this myself [with the help of my boyfriend], but it's quite easy and most of all saves you a lot of money. Just make sure you use a high quality flat iron and start early in the day, because with long hair, it may take up to 6 hours to complete the process. But it's truly worth the extra savings.
Leaves you with soft, healthy looking and straight hair
When your hair grows out, it's a lot of work to keep your hair straight at the roots

Amsterdam, Netherlands
4 Stars

By Lynn from Ny on June 10, 2015
I've had this process done numerous times. It's starting to grow out. I'm getting my wave at top of head and wondering if I permed my hair (curly) if it's going to damage it..?

By debora from raleigh nc on September 15, 2012
how to use ? do we wash the hair before using the iron? thank you

By Amanda from Huntington Beach California on May 2, 2015
Can it be used on bleached hair

By Martina from ny on June 19, 2015
After applying and dried. When do I wash my hair again

By nereida from virginia on December 8, 2012
what temperature should the flat iron be in the first flat iron and then in the second flat ironing
By Carmen from LA on June 22, 2013

220C, I read somewhere.

By charlene from florida on May 7, 2013
my client has colored treated hair with a level 6 hair color, she has very coarse curly eghptian hair with hard to cover gray can I use this product on her, I have been using the la brazilian keritan treatment on her and even the strongest one only lasts maybe 2 wks and still takes me an hour to flat iron afterwards, she really wants something stronger but all the japanese straighters say to use on semi or demi and we use 20 volume. can you suggest something better but not real damaging?
By Valeria Turner from Conyers, GA (ATL) on May 10, 2013

Just know that this is a "permanent" straightening system. Make sure that your client is looking for permanent results, and it is recommended to have at least 4 inches of regrowth for touch ups.( The Brazilian Treatments and those similar are NOT permanent systems and last up to 8-10 weeks if applied accurately.) In regards to the color, you can use this on color-treated hair with no more than a 20 vol application and absolutely NO bleached hair, because it WILL break. I suggest applying this service before your color service, this system will slightly lighten your hair color. The results are Great!

By Dorie from 02668 W. Barnstable,MA on September 26, 2012
I used the Rusk Therman Shiny Str8-Permanent Straightener with Keratin and it only lasted until I washed my hair. Several days later, when I washed the hair, the kink returned full force. I am looking for a beauty salon that uses the anti-curl formula which seems to last several months. Can you give me the names of several salons near or close to my zip code. I would greatly appreciate it. Thank you. Dorie

By Carla Johnson from Lethbridge, Alberta on December 17, 2012
Can this product be used on colored hair that has had a 20 and 30 volume developer?

By Lauren from Uk on June 27, 2012
Hi there, do you ship to the uk?

By Sahar from Denmark on November 3, 2012

I am currently looking for a good straightening product for my hair, and Rusk Thermal Shiny Str8 seems to be good.

BUT...You say its formaldehyde-free…
Can I please get the ingredients list? Since it is not seen on the bad pixel picture you have here.

Because even though it is formaldehyde-free, some chemicals release the cancer causing formaldehyde under straightening procedures.

Best regards

By Joanne Schroeder from California on September 29, 2012
i had my hair previously straighted with i-straight but now want to go with rusk. is there a problem with overlapping these formulations?

By jbees from boston, ma on March 25, 2012
How soon does the product expire after opening? So if I wanted to open it up and use a small amount for a test run, how long would I have to use up the product before it goes bad?
By Cheryl Sutton from Ashland, Ohio on March 28, 2012

Directly from the instructions: Once product container has been opened, use within 24-48 hours. Exposure to atmospheric oxygen, once container has been opened, causes the product's efficacy to slowly diminish.

I personally have always used all the product in one setting. I love it!!!

By Dana from Atlanta, Georgia on June 2, 2015
I have dry hair that I have highlighted and lowlighted and also colored. Which formula would be best?

Rusk Thermal Shiny Str8 - Permanent Straightener (formaldehyde-free)