Onion & Rosemary Keratin Smoothing Kit: Stronger & Straighter

Onion Keratin by Natural Sant is a hair straightening mask formulated with hydrolyzed keratin, biotin, onion and rosemary extracts, and formaldehyde-free straightening ingredients. Enriched with natural extracts, it helps hydrate the hair while improving shine, softness, and manageability, leaving hair looking healthier.

Long-Lasting Straight Hair
Provides straight, smooth hair for up to 4–6 months with proper care.

Frizz Elimination & Humidity Control
Seals the hair cuticle, reducing frizz and improving texture.

Repair & Strength with Keratin
Keratin helps restore damaged hair, improving softness and resilience.

Infused with Onion, Rosemary & Biotin
Supports stronger, healthier-looking hair while enhancing shine.

Salon Results at Home
Designed for easy at-home application with professional results.

Step 1. Wash and Dry

Wash the hair three times with Natural Sant Onion & Biotin Shampoo with Rosemary Extract until it is completely clean and free of excess oil. Do not apply conditioner. Towel-dry the hair first, then blow-dry it completely to remove all moisture.

Step 2. Apply the Keratin

Section the hair using hair clips. Apply an adequate amount of Natural Sant Onion Keratin evenly to each section, from roots to ends, avoiding direct contact with the scalp. Comb through each section, stretching the hair from roots to ends to ensure even product distribution. Allow the product to process for 30 minutes. During this time, do not tie up the hair or use clips that could leave marks.

After the processing time, flat iron the hair from roots to ends, at least six times, paying special attention to the areas with the strongest natural wave pattern, such as the nape and hairline. Use a professional flat iron at the appropriate temperature for the hair type to maximize the straightening results.

Step 3. Rinse and Maintenance

Wash the hair with Natural Sant Onion & Biotin Shampoo with Rosemary Extract. Then apply Natural Sant Onion & Biotin Hair Treatment with Rosemary Extract (Smooth Hydration) as the maintenance treatment after every shampoo. Use a small amount each time. One 15 mL sachet is recommended for approximately five applications. Do not use additional conditioners. Finally, blow-dry the hair completely.

For best long-term results, continue using Natural Sant Onion & Biotin Shampoo and Natural Sant Onion & Biotin Hair Treatment as part of your regular hair care routine.

Delivery time in the United States usually takes
3 to 7 business days

Shipping costs range from $7 to $15, depending on the weight of your package and your exact location.