
Natural Ingredients

Sulphate & Paraben Free

Gentle Cleansing

Nourishment & Hydration

Natural Ingredients

Sulphate & Paraben Free

Gentle Cleansing

Nourishment & Hydration

Natural Ingredients

Sulphate & Paraben Free

Gentle Cleansing

Nourishment & Hydration

Natural Ingredients

Sulphate & Paraben Free

Gentle Cleansing

Nourishment & Hydration
Permanent Organic Hair Straightening Treatment
Powerful. Washable. Formaldehyde-Free.
The ultimate solution for straightening curly, colored, and coarse hair without fumes or harsh chemicals.
For licensed professionals only.
Rich with Natural Ingredients

Formaldehyde Free

Suitable for All Hair Types

Hair Doesn’t Get Affected by Swimming or Sports
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Step 1: Wash
Wash twice with Clarifying Shampoo. Rinse and dry 100%.
Step 2: Apply Treatment
Apply Bio Sleek section by section, ¼ inch from the root.
Leave on for 60 minutes with heat (or 90 for coarse/curly hair).
Step 3: Rinse
Rinse thoroughly with water.
For damaged hair: apply conditioner or a mask before styling.
Step 4: Blow Dry & Flat Iron
Blow dry completely.
Flat iron each section 4–6 times using a high-heat iron (up to 480°F / 250°C) until the hair is straight, smooth, and shiny.
Aqua, Glyoxyloyl Carbocysteine, Glyoxyloyl Keratin Amino Acids, Propylene Glycol Dibenzoate, Cetearyl Alcohol, Behentrimonium Methosulfate, Cyclopentasiloxane, Dimethiconol, Dimethicone Crosspolymer, Ceteareth-20, PEG-90M, Cetrimonium Chloride, Argania Spinosa Kernel Oil, Benzyl Alcohol, Salicylic Acid, Glycerin, Sorbic Acid, Polyquaternium-37, Lanolin Alcohol, Parfum, Stearyl Alcohol, Dimethicone, Acetamide MEA, Hydrolyzed Keratin, Panthenol, Sorbitol, Sodium Cocoyl Collagen Amino Acids, Cocoyl Sarcosine, Triticum Vulgare Acid, Triticum Vulgare Germ Oil, Linolenic Acid, Linoleic Acid, Tocopherol, Simmondsia Chinensis Seed Oil, Tocopheryl Acetate, Hydrolyzed Glycosaminoglycans, Polysorbate 20, Polysorbate 80, Hexyl cinnamal, D-Limonene, Linalool, Benzyl salicylate.
This product is for professional use only. Always wear protective gloves during application and avoid contact with the scalp, skin, and eyes. In case of contact, rinse immediately with cool water for 15 minutes. A sensitivity test must be performed 48 hours prior to treatment. Temporary color variations may occur on blonde, white, or bleached hair for up to one week after application. Hair may have an unpleasant odor when wet. Do not use on clients with known sensitivity to any of the ingredients. Avoid over-ironing damaged hair. Store in a cool, dry place away from direct sunlight, and keep out of reach of children.
Step 1: Wash
Wash twice with Clarifying Shampoo. Rinse and dry 100%.
Step 2: Apply Treatment
Apply Bio Sleek section by section, ¼ inch from the root.
Leave on for 60 minutes with heat (or 90 for coarse/curly hair).
Step 3: Rinse
Rinse thoroughly with water.
For damaged hair: apply conditioner or a mask before styling.
Step 4: Blow Dry & Flat Iron
Blow dry completely.
Flat iron each section 4–6 times using a high-heat iron (up to 480°F / 250°C) until the hair is straight, smooth, and shiny.
Aqua, Glyoxyloyl Carbocysteine, Glyoxyloyl Keratin Amino Acids, Propylene Glycol Dibenzoate, Cetearyl Alcohol, Behentrimonium Methosulfate, Cyclopentasiloxane, Dimethiconol, Dimethicone Crosspolymer, Ceteareth-20, PEG-90M, Cetrimonium Chloride, Argania Spinosa Kernel Oil, Benzyl Alcohol, Salicylic Acid, Glycerin, Sorbic Acid, Polyquaternium-37, Lanolin Alcohol, Parfum, Stearyl Alcohol, Dimethicone, Acetamide MEA, Hydrolyzed Keratin, Panthenol, Sorbitol, Sodium Cocoyl Collagen Amino Acids, Cocoyl Sarcosine, Triticum Vulgare Acid, Triticum Vulgare Germ Oil, Linolenic Acid, Linoleic Acid, Tocopherol, Simmondsia Chinensis Seed Oil, Tocopheryl Acetate, Hydrolyzed Glycosaminoglycans, Polysorbate 20, Polysorbate 80, Hexyl cinnamal, D-Limonene, Linalool, Benzyl salicylate.
This product is for professional use only. Always wear protective gloves during application and avoid contact with the scalp, skin, and eyes. In case of contact, rinse immediately with cool water for 15 minutes. A sensitivity test must be performed 48 hours prior to treatment. Temporary color variations may occur on blonde, white, or bleached hair for up to one week after application. Hair may have an unpleasant odor when wet. Do not use on clients with known sensitivity to any of the ingredients. Avoid over-ironing damaged hair. Store in a cool, dry place away from direct sunlight, and keep out of reach of children.

Why Hairstylists Love Bio Sleek
Fume-Free & Formaldehyde-Free
No smoke, no eye irritation, no dangerous chemicals — just a clean, safe environment for you and your clients.
100% Washable Treatment
The product is fully rinsed out before blow-drying and flat ironing. No buildup, no stickiness, no surprises.
Permanent Results
Straightens hair up to 99%, even on curly and color-treated textures. Only the roots need touch-ups every 6–12 months.
One-Time Correction Option
If any areas stay wavy after the first wash, simply pass the flat iron again — no need to reapply the treatment.
Who is it for?
- Hairstylists working with curly, thick, or frizzy hair
- Clients with colored hair up to level 7
- Professionals looking for long-lasting straightening without chemicals
- Safe for pregnant women and kids (10+)
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Frequently Asked Questions
Yes. It straightens up to 99%, even on curly or resistant hair.
Yes — for colored hair up to level 7. For level 8+ or bleached hair, combine Bio Sleek with Nano Silky.
No — Bio Sleek is an amino acid-based straightening treatment, not a chemical relaxer or traditional keratin.
It’s a permanent treatment. Only the roots need retouching every 6–12 months.
Check out our Instagram @nanolamination