To equalize porosity of highly porous hair during a perm service, which product is often used?

• A. Pre-wrap
• B. Pre-conditioner
• C. Scalp Protector
• D. Hair Serum

Answer: (A)

Focusing on porosity equalization, the goal is to make every strand absorb the perm solution at a similar rate so processing is uniform across the head. A pre-wrap provides a soft, protective barrier under the wrap that helps distribute moisture and chemical solution more evenly along the hair shaft. By reducing direct contact variability and preventing pooling near the scalp, it helps calm differences in how porous sections pick up the product, which is especially important for highly porous hair. Other products don’t address this balance: a pre-conditioner adds moisture but can leave residues that interfere with chemical action; a scalp protector guards only the skin; and a hair serum adds oils that can alter penetration and lead to uneven results.