It is often believed that only colored and bleached hair needs special moisture and care, but structural damage can also occur in hair that has not been chemically treated at all. Repeated use of straighteners, curling irons, or hairdryers at high temperatures can cause the structure of the hair to break down. Hair that has lost moisture and elasticity may need strengthening products to recover and become more resilient.

 

Easily split or brittle hair often indicates that the keratin layer has been damaged and needs repair. Excessive brushing, tight hairstyles, or improper use of styling tools can damage hair. Long-term exposure to the sun, chlorine, seawater, or pollution can also weaken the hair structure. Of course, hair that has been colored, bleached, permed, or straightened is exposed to chemical processes that weaken its structure and cause damage to the keratin layer.

 

 Hair keratin layer and disulfide bonds are two different, but interconnected, parts of hair structure. They affect hair’s strength, elasticity, and appearance in various ways. SensiDO Simplex Bonder treatment performed in salons is created to impact both of these.

 

The treatment repairs existing damage in the hair. It also rebuilds hair structure, deeply moisturizes, and strengthens. Treatment provides protection from mechanical stress. It is suitable for all hair types and conditions and works excellently on both treated and virgin hair.

 

You can maintain in-salon achieved results at home by using the Simplex Bonder Re-Bonding Shampoo and Conditioning Mask. The shampoo and conditioner repair hair’s structure with every use. The result is strong, shiny, and healthy-looking hair. Both products contain color and UV protection, are fragrance-free, and vegan.

 

Tip: You can use the conditioner like a regular conditioner, leaving it on for 2-3 minutes. For a deeper treatment effect, leave it on for 10-15 minutes and rinse thoroughly.

 

What is it? The Keratin layer of the hair refers to the structure of the hair made mostly of a protein called keratin. Keratin is hair's main building block, forming its core structure.  

Location: Keratin is part of the inner layer of the hair, the cortex, which is responsible for the strength and elasticity of the hair.  

Function: It provides hair with its basic structure and strength. Keratin acts as a "building block," and damage to it can cause weakness, breakage, and a brittle appearance.  

Damage: Chemical treatments, heat treatments, and mechanical stress can damage keratin, making hair weaker and more prone to breakage.

 

What are they? Disulfide bonds are chemical bonds that form between amino acids, particularly cysteine, in the keratin. These bonds connect keratin chains to each other.  

Location: Disulfide bonds are inside keratin and hold keratin structures together tightly. They form a strong internal "network" of the hair.  

Function: They are responsible for hair’s elasticity and shape retention. These bonds allow the hair to maintain curls or straightness for a long time.  

Damage: Disulfide bonds can break during chemical treatments such as bleaching, perming, or straightening. Broken disulfide bonds make hair weaker and more vulnerable to external damage.