Reviews about Schwarzkopf Professional Osis+ Flatliner Heat Protection Spray

Everything seems fine, but I was expecting more. Overall, I recommend it.

I purchased this spray based on high ratings and recommendations from hairdressers. When applied to damp or dry hair, even in small amounts, the hair becomes straw-like. When styling with a styler or brush, the hair becomes fluffy and unruly, not smooth. I tested the liquid itself for heat protection, and it works wonderfully. The scent is neutral and not noticeable on the hair.

Amazing product, it truly protects the hair without weighing it down or making it sticky. The scent is practically nonexistent, which is important to me as I don't want to feel the chemical smell. It sprays evenly. I bought it based on the recommendation of my professional hairdresser, who knows their stuff. Being a blonde, I am very careful with my hair care routine. The delivery, as always, was prompt and courteous.

I will repeat it for the fifth time. I have porous thick hair, to which it provides smoothness and a well-groomed appearance. For me, it is the best.

Before this, I had a thermal protective lotion from CHI. If we compare Osis with CHI, Osis is absolutely useless. It even stinks.

I bought it based on the recommendation of a hairdresser, but I didn't see any effect on my hair.

Great product! I have purchased it multiple times and I am always satisfied with the quality. I use it before blow-drying with a straightener. It leaves my hair extremely smooth and shiny. I highly recommend it!

The product is decent and performs its function well. However, it turns soft hair into stiff hair, which becomes very tangled, unruly, and difficult to style. It works better on already stiff hair. However, I will not purchase it again.

The hair feels soft after using the spray, but it tends to get frizzy and static.

Good thermal protection, I am purchasing it for the second time. It doesn't weigh down my hair and doesn't leave any unpleasant odor.

I am extremely satisfied with this product. I have been using it for several years now.

I apply it as a final step before straightening my hair. It perfectly smooths out my hair in this case. My hair looks shiny.

I definitely recommend it.

I tried it out and the ends of my hair became dry. It's not surprising, as the first ingredients are alcohol and propylene glycol. These things can be detrimental to the hair (the formula itself will be lighter than just some oil), so it will work fine for thick hair but dry out thin hair. Although the manufacturers actually advise the opposite.

Nothing special, like all the others.
I will continue my search.

The spray is excellent and does its job exceptionally well.

I ordered this heat protectant for the first time based on my friend's recommendation. I'm not sure about the protective effect yet, but I can assure you that my hair feels amazing in my hands. It is smooth, shiny, and perfectly straightened. I definitely don't regret buying it.

There is a fixing effect, but it is not strong.
I have porous hair and it remained fluffy before and after using the spray.
This is despite the fact that I always brush it to make it smooth.

I don't understand why this heat protectant is always recommended, as there is nothing special about it. There are no negatives or positives. Therefore, 3 stars.

I really liked it.

I purchased it for 110 UAH on a website in Prague. There is absolutely no smell to it. Plus, it is very convenient.

I didn't like the spray at all. I have long hair, and it acts like hair spray, making it difficult to comb and sticking near the roots. I tried it once and I don't want to use it again.

I can't understand why this spray has so many good reviews. The spray is like water. Moreover, it even started tangling my hair. I've never had this problem before.

Favorite heat protectant. It doesn't weigh down the hair, and most importantly, it protects it from damage. Also, personally for me, a plus is that I noticed that without it, my hair gets static from wearing a hat. With it, everything is fine.

I have used this product for quite a long time, and I have used 3-4 bottles of it, but unfortunately, I haven't seen any results. I used it for regular blow-drying and mainly for my hair ends. As a result, my ends started splitting even more and breaking off. I also use masks and conditioners, trying to figure out the reason, but for now, I can only give this product one star because, for the price I paid, it has had zero effect.

After using this product, my hair became drier. I will not buy it again.

I couldn't open it at first. Thank you to the makeup staff who called me after my question about how to activate it and explained what to do. Following their suggested instructions, it worked out well. The thermal spray is excellent to use! It is unclear whether it provides thermal protection or not, but I will keep an eye on my hair.

The best heat protectant, but keep in mind that it is specifically a heat protectant and not a hair care product.

Average quality heat protection. It seems to do its job, but it's not impressive. I won't buy it again.

Great heat protection, hair feels smooth and shiny, looks hydrated.

I bought it as a gift, and it was delivered from the EU. When I transferred the product from its original packaging to the gift bag, almost everything spilled. I called customer service and they said that the packaging arrived intact, so it's not their problem. I don't understand how they can package it like this. Thank you for ruining my mood and wasting 300 UAH.

I have ordered this product for the fourth time now, as it provides good protection against high temperatures. Initially, I was not impressed with the spray, as it tends to slightly "stick" the hair together and give the appearance of dry ends. However, if I apply oil on top of the spray, the result is truly amazing.

I didn't understand this product at all. After using this spray, my hair became stiff and difficult to comb. It didn't live up to my expectations, especially considering the price. I could have bought two heat protectants that were much better.

I have ordered this product for the second time now. It makes my hair easy to comb through, especially when I use it before blow drying. Overall, this spray does a great job in fulfilling its purpose.

Well, it's like this... I bought it based on my evening hairstyle course instructor's recommendation. I tried it on myself, but I don't see any noticeable effect. I agree that if you spray it on damp hair, they become difficult to comb afterwards. I'm not sure if I will buy it again.

I really liked using it after washing on damp hair.

This product was recommended to me by my hairdresser. The best thing about it is that it prevents my hair from becoming frizzy. I am very satisfied with it. The delivery was flawless, as always! Thank you!

The hair looks very shiny and seems to have become thicker after using this product. The smell is not the best, but at least it smells natural)). If you spray it on wet hair, it can be a bit difficult to comb through, worse than with other sprays, but once it dries, it becomes very easy. I recommend it.

Usually, products from this brand have a very pleasant scent. (There is a fragrance.) There is no protection against tampering, and when you apply it to your hair, it doesn't provide any stickiness or other effects (absolutely none). I am very disappointed. The order was coming from the EU.

Best heat protection. The smell remains the same as before and so does the effect.

I have been using this product for a year, and I will continue using it in the future! My hair has noticeably improved with this heat protection. I even used it during the summer when I didn't use a hairdryer or curling iron. I absolutely love this spray! The price is definitely worth the quality, 100%!

This is a great product that leaves my hair well-groomed and smooth.

"Terrible product. This is my first time writing a review here. It does not provide any smoothness and instead makes everything sticky. It is not suitable for fluffy hair or dry hair."