Adding Silicone to Heat Protectant Spray for Humidity Resistance

Yes, you can add certain types of silicones to a heat protectant spray to help make your straightened hair more resistant to humidity and sweat, which can help maintain the style longer.

Silicones work by forming a thin film on the hair shaft. This film acts as a barrier that can help repel moisture from the air and sweat, reducing the tendency for hair to revert to its natural wavy state.

Relevant types of silicones for this purpose include film-forming silicones like Trimethylsiloxysilicate (found in products like Silicone Film) or silicones designed for hair conditioning and coating that are compatible with water-based formulas, such as Silicone Hi-Cond.

Regarding heat protection, while silicones themselves can generally withstand high temperatures and the film they form offers some degree of thermal insulation, their primary benefit in this context is humidity and water resistance. They are not typically considered the main heat protection ingredient against the high heat of straightening irons. For effective heat protection, your spray should primarily contain ingredients specifically known for thermal protection.

The degree of water and sweat resistance provided by adding silicone will depend on the specific type of silicone used and its concentration in the final spray formulation.