A Keratin Polypeptide Hair Mask is an intensive, reparative hair treatment designed to rebuild, strengthen, and smooth hair from the inside out. Unlike traditional keratin that merely coats the hair, hydrolyzed keratin polypeptides are tiny protein fragments small enough to penetrate the hair shaft. They fill in gaps and cracks in the damaged cuticle, acting like "liquid building blocks" to restore hair's lost protein structure, resulting in dramatically improved strength, elasticity, and shine.

Key Features & Benefits

1. Deep Structural Repair: Penetrates the hair cortex to rebuild and reinforce from within, repairing damage caused by heat, chemical processing, coloring, and environmental stressors.
2. Intense Strength & Anti-Breakage: Cross-links with the hair's natural keratin to fortify strands, reduce split ends, and minimize breakage, making hair more resilient.
3. Smoothing & Frizz Control: Fills the cuticle layers to create a smooth, uniform surface. This seals the hair shaft, locking in moisture and locking out humidity for frizz-free, manageable hair.
4. Brilliant Shine & Softness: A sealed, smooth cuticle reflects light optimally, resulting in high-gloss, salon-quality shine and a luxuriously soft texture.
5. Improved Elasticity: Helps restore hair's natural flexibility, preventing it from becoming brittle and snapping easily when stretched.
6. Color & Chemical Protection: Helps protect chemically treated hair by reinforcing its structure, potentially extending the life and vibrancy of color.

Ideal For:

1. Damaged, Brittle, or Over-Processed Hair: (Bleached, colored, permed, relaxed)
2. High-Heat Styling Users: Regular use of blow dryers, flat irons, or curling wands.
3. Frizzy, Unruly, or Porous Hair: Especially hair that feels rough, dry, and lacks shine.
4. Hair Lacking Strength & Elasticity: Hair that stretches and doesn't bounce back, or breaks easily.

How It Differs from Regular Conditioners/Masks:

1. Molecular Size: Polypeptides are smaller than proteins in standard conditioners, allowing for true penetration rather than just surface coating.
2. Action: It's a rebuilder, not just a moisturizer. It addresses the core structural issue of protein loss.
3. Result: Provides long-term improvement in hair's integrity, not just temporary softness.

Suggested Usage Instructions:

1. Frequency: Use 1-2 times per week, or as needed for intensive repair. Can be alternated with a purely hydrating mask.
2. Application: After shampooing, gently squeeze excess water from hair. Apply a generous amount from mid-lengths to ends, avoiding the scalp. Comb through for even distribution.
3. Processing Time: Leave on for 5-10 minutes. For severely damaged hair, leave for up to 15-20 minutes, preferably with a shower cap to trap heat.
4. Rinse: Rinse thoroughly with cool water to help seal the cuticle.
5. Follow with: Can be used as part of your regular routine. For best results, follow with a leave-in treatment if desired.

Key Ingredients to Look For (and their role):

1. Hydrolyzed Keratin: The star ingredient. Keratin broken down into small polypeptides and amino acids for penetration.
2. Strengthening Agents: (e.g., Vegetable Proteins, Amino Acids).
3. Moisturizing & Sealing Agents: (e.g., Shea Butter, Argan Oil, Jojoba Oil, Panthenol (Pro-Vitamin B5)) to balance protein with moisture.
4. Silicones (like Dimethicone): Often included for instant slip, detangling, and extra shine. (Can be omitted in "clean" formulations).
5. Humectants: (e.g., Glycerin) to attract and hold moisture.

Important Note / Warning:

1. Protein/Moisture Balance: Overuse on hair that is already protein-sensitive or low-porosity can lead to stiffness, brittleness, or "protein overload." Signs include hair feeling straw-like, stiff, or tangling more. If this occurs, pause use and switch to deep moisturizing treatments.