Sebastian Dark Oil Smooth and Shine Mask — 4.9 fl oz lightweight argan oil treatment for shine & softness

Sebastian Dark Oil Smooth and Shine Mask is a lightweight, deeply nourishing hair mask that adds shine, softness, and a warm sandalwood-cedar fragrance without weighing hair down.

This mask is formulated to restore moisture and surface smoothness while keeping hair feeling airy rather than heavy. Infused with argan oil plus sandalwood and cedarwood extracts, it works inside a Dark Oil routine or as a standalone treatment to improve manageability and impart visible gloss. The texture absorbs quickly, making it suitable for regular use on a range of hair textures from fine to thick.

How does this mask improve hair texture and manageability?

The formula delivers concentrated conditioning agents and lightweight oils that help detangle, soften, and smooth the hair fiber. By coating strands with nourishing lipids, it reduces friction and flyaways, allowing styling tools and combs to glide through more easily.

• Argan oil for softness and surface conditioning
• Sandalwood and cedarwood for a long-lasting warm scent
• Lightweight emollients that avoid weighing fine hair down
• Designed to improve slip for easier detangling

When and how should I use the Dark Oil Smooth and Shine Mask?

Use it as a weekly intensive mask or a more frequent quick-treatment depending on hair needs. Apply to mid-lengths and ends on damp, towel-dried hair, leave on according to desired intensity, then rinse thoroughly for instant softness and sheen.

• Weekly deep treatment: apply generously and leave 5–10 minutes
• Quick refresh: leave 1–3 minutes for light conditioning
• Works best after shampooing with a Dark Oil cleanser or a gentle sulfate-free shampoo
• Can be included in a pre-styling routine for added smoothness

Will this mask work for my hair type and concerns?

The mask is formulated to suit a wide range of hair types, from fine to coarse, because it balances rich nourishment with a lightweight finish. It targets common concerns like dryness, dullness, frizz, and lack of slip, but avoid heavy application at the roots for finer hair to maintain volume.

• Fine hair: use sparingly on lengths and ends to prevent flattening
• Thick or dry hair: apply more liberally for deeper conditioning
• Color-treated hair: compatible when rinsed thoroughly and used as directed
• Curly textures: helps define and reduce frizz without stiffness

Who is this for?

Sebastian Dark Oil Smooth and Shine Mask is aimed at anyone wanting a salon-grade treatment that boosts shine and softness while staying lightweight. It’s ideal for people who like scented hair care, those building a Dark Oil routine, and anyone seeking a versatile mask that can be used both as an intense weekly rescue and a quick finishing treatment. Avoid heavy root application if you need maximum lift at the scalp.

Ingredients

Aqua/Water/Eau, Stearyl Alcohol, Behentrimonium Chloride, Cetyl Alcohol, Parfum/Fragrance, Panthenol, Isopropyl Alcohol, Benzyl Alcohol, Phenoxyethanol, PEG-2M, Methylparaben, Propylene Glycol, Quaternium-80, Propylparaben, Tetramethyl Acetyloctahydronaphthalenes, Disodium EDTA, Hexyl Cinnamal, Hexamethylindanopyran, Acetyl Cedrene, Linalyl Acetate, Coumarin, Citronellol, Silica, Citric Acid, Argania Spinosa Kernel Oil, Simmondsia Chinensis (Jojoba) Seed Oil, BHT.