Water Retention Within Hair Strand Is The Key To Protecting Hair From Heat Damage

Heat styling is quite a common practice at home and in hair salons. However, frequent heat treatments have become a concern, as curling irons and hair straighteners can easily reach 200 ºC, causing serious hair damage, like changing cuticle structure; changing and decomposing keratin; promoting water loss and changing hair strand mechanical properties.

To follow the pace of styling practices, the cosmetic industry started to use silicones in hair heat protectants, as they coat and create a barrier against heat. In fact, some of the characteristics of silicone do justify its use. Stability, low heat conductivity and high specific heat have turned silicones into favorite hair heat protectants. On the other hand, it is known that some of the silicones used might build up, leaving hair weighed down, difficult to style and lifeless, as silicones can attract dirt. In addition, the environmental risks posed by chlorinated hydrocarbons, the starting material, and bioaccumulation issues have caused it to be removed from several cosmetics.

Overcoming high-performance challenges in hair styling - with proven safety - Chemyunion introduces a heat protection active with an innovative mechanism of action: ThermoShield

Water retention within hair strand is the key to reduce hair heat damage (its physical characteristics, like low heat conductivity and high specific heat, allow it to act as an insulating agent). ThermoShield can trap water inside the hair fiber and create a heat barrier, shielding hair against blisters, fissures and other damage, without compromising styling. 


  • Retains 24% more water inside the strands 
  • Keeps hair temperature 16% lower, preventing overheating 
  • Preserves cuticle integrity 
  • Boosts the straight effect 23% after 24 hours 

Efficacy Tests: 

1. Water content test – More-moisturized hair 

2. Hair surface test – Less-damaged cuticles

 3. Maintains hair temperature - Avoids hair overheating