Which product is commonly used to help control static in hair?

Conditioner with amines or quaternary ammonium compounds (quats) is effective in controlling static in hair because these ingredients have conditioning properties that help to smooth the hair cuticle. When the hair cuticle is smooth, it reduces friction and prevents the buildup of static electricity that can occur due to dry or damaged hair. The cationic nature of amines and quats allows them to bond to the negatively charged hair strands, providing moisture and reducing flyaways caused by static.

In contrast, hair spray is primarily designed to hold hairstyles in place rather than address static hair issues directly. Hair gel can provide structure and hold, but it may not effectively combat static, especially if it's not formulated with conditioning ingredients. Leave-in conditioners can help with frizz and moisture, but they may not specifically target static control as effectively as those with amines or quaternary compounds. Thus, the specific formulation of conditioners that includes amines or quats makes them particularly suitable for controlling static in hair.