Sienna Naturals • Lock & Seal Anti-Breakage Oil

Name: Sienna Naturals • Lock & Seal Anti-Breakage Oil
Brand: Sienna Naturals
Price: 38.5 EUR
Availability: OutOfStock

€38,50 EUR

Sienna Naturals' Lock & Seal Anti-Breakage Oil is a unique treatment oil that mends split ends and smooths damaged cuticles for up to 5 washes.

Its Anti-Breakage Technology—a castor oil copolymer—rebuilds cuticle bonds broken by heat, color, and mechanical styling, while sealing in moisture for smooth, shiny, and resilient hair.

Apply to damp or dry hair after leave-in conditioner and styling products.

Volume = 90ml

See other Sienna Naturals products

Anti-Breakage Technology: repairs split ends for 5 washes

Lock & Seal is no ordinary hair oil. Its main innovation is Anti-Breakage Technology—a hydrogenated castor oil copolymer—that rebuilds the bonds of cuticles damaged by heat, bleaching, straightening, and mechanical manipulation. Unlike conventional oils that superficially coat the hair fiber, Lock & Seal actively penetrates and repairs damaged ends for lasting repair for up to 5 washes. An anti-breakage treatment that really makes a difference.

Shea oil, grapeseed oil, and shea esters: a repairing trio

Shea oil restores moisture and suppleness to dry, damaged hair without residue. White grapeseed oil—light and rich in antioxidants—seals in moisture, fights frizz, and adds shine while protecting and nourishing the scalp. Shea esters provide natural slip with a clean, silky finish. Together, they form a luxurious treatment oil that cares for as much as it beautifies.

The final step in your routine for smooth, shiny hair

Apply after leave-in conditioner and styling products, on damp or dry hair as needed. A small amount is enough—reapply mid-week to dry hair to smooth, boost shine, and increase elasticity. It's the final seal that enhances the rest of your routine and maintains healthy, strong, and shiny hair between washes.

Apply to damp or dry hair after leave-in conditioner and styling products.
A little goes a long way — start with a few drops and adjust according to hair density.
Reapply to dry hair mid-week to smooth and boost shine.
For very fragile hair, use after Dew Magic and before styling products.
Pro tip: apply to 75% dry hair for maximum shine and elasticity.

Butyrospermum Parkii (Shea) Oil, Shea Butter Ethyl Esters, Vitis Vinifera (Grape) Seed Oil, Cocos Nucifera (Coconut) Oil, Hydrogenated Castor Oil/Sebacic Acid Copolymer, Adansonia Digitata Oil, Caprylic/Capric Triglyceride, Tocopherol, Anthemis Nobilis Flower Oil, Cananga Odorata Flower Oil, Canarium Commune Gum Oil, Citrus Aurantium Dulcis (Orange) Flower Oil, Geranium Maculatum Oil, Jasminum Officinale (Jasmine) Flower/Leaf Extract, Juniperus Virginiana Oil, Litsea Cubeba Fruit Oil, Rosa Damascena Extract, Rosa Damascena Flower Oil, Tanacetum Annuum Flower/Leaf/Stem Oil

Why choose Colorful Black?

Fast delivery France / Europe / Overseas

Free delivery to a collection point * on orders over €79

Also available in our Paris store

Payment in 3 installments with no fees (Scalapay)

Available at : 01 42 36 54 14 or message

Why choose Sienna Naturals • Lock & Seal Anti-Breakage Oil ?

Anti-Breakage Technology: active repair for up to 5 shampoos

Hydrogenated castor oil copolymer actively replenishes cuticle bonds damaged by heat, bleaching, and handling. Lasting repair, not just an illusion of softness.

Smooths, seals & shines with no residue

Shea Oil, Grapeseed Oil and Shea Esters seal in moisture, smooth the cuticle and deliver a clean, natural-looking shine. No residue, no heavy feel—just silky smooth, healthy-looking hair.

The Final Seal to Any Good Hair Routine

Applied as the last step after styling products, Lock & Seal sets and enhances the entire ritual. It keeps hair smooth, shiny, and resilient between each wash day, for a long-lasting style.

Vegan, clean, and dermatologist-tested

Free from endocrine disruptors, mineral oil, and film-forming silicones — only active botanical oils and patented technology. A premium treatment oil that meets clean beauty standards.

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Frequently Asked Questions about Sienna Naturals • Lock & Seal Anti-Breakage Oil

What is Anti-Breakage Technology?

It's a hydrogenated castor oil copolymer that rebuilds damaged cuticle bonds and smooths split ends. The repair is active and lasts up to 5 washes — not just superficial coverage.

Will Lock & Seal be suitable for my fine hair?

Please note, this treatment oil increases moisture retention and may slightly weigh down very fine or fine hair. Use in very small quantities and observe the effect on your hair.

At what step of the routine should I use it?

After leave-in treatment (Dew Magic) and styling products (cream, jelly, or mousse). As a finishing touch to your routine, on damp or dry hair as needed. Can also be reapplied alone mid-week.

Can it be used daily?

Yes, in small amounts. Its rich but absorbable formula is suitable for regular use without buildup, as long as the quantity applied is appropriate for your hair density.

Does this product contain allergens?

The formula contains floral essential oils (ylang ylang, jasmine, rose, chamomile, orange, geranium). In case of sensitivity, consult the full INCI list before use.