Bio Sleek Professional Straightening Treatment
Bio Sleek is a professional organic straightening treatment that delivers permanent results while protecting and nourishing the hair. It smooths frizz, strengthens hair fibers, and provides a long-lasting sleek finish without the use of harmful chemicals.
It is 100% formaldehyde-free, washable before flat ironing, and completely safe for both stylists and clients including pregnant women and children (10+). Bio Sleek deeply penetrates the hair, neutralizes puffiness, smooths curls and frizz, and enhances manageability and shine.
How to Use
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.
If curls or waves remain, you may correct them with a flat iron.
Best for hair types
- Natural, wavy, or curly hair
- Frizzy or unmanageable hair
- Clients who want long-term straightening without toxic fumes
- Hair colored up to level 7
Ingredients
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
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Pro Tips & FAQs for Best Results with Bio Sleek
There are a few reasons this may happen, and they are usually related to application or flat iron technique:
1. Application Technique
The product must be applied to small, thin sections of the hair.
Make sure the product is applied evenly from a quarter inch away from the root to the ends, and that you comb each section after applying to ensure complete coverage.
2. Flat Iron Technique
You must work in very small sections when flat ironing.
If you used large sections or went too fast, the heat may not have penetrated properly.
Go slowly with the flat iron pass over each section until the hair looks like butter and shines.
3. Temperature Settings
For best results, set your flat iron to 450°F and use a nano titanium flat iron with slow passes (12-15 times per section).
If you want to reduce your working time, we recommend using the Lizze flat iron at 480°F this allows you to straighten the hair with only 5-7 passes per section.
Always monitor the condition of the hair and use your professional judgment. For fragile or very light-colored hair, lower the heat and adjust your technique accordingly.
4. Post-Wash Touch-Up
One of the best features of Bio Sleek is that if, after washing, the client still sees puffy or wavy sections, you don’t need to redo the entire treatment.
Simply go over those areas again with the flat iron no need to reapply the product or wash again.
Can I Color the Hair the Same Day as the Treatment?
Yes, you can color the hair the same day after the Bio Sleek + Nano Silky treatment but only with the right post-treatment steps.
To color the roots the same day:
- Wash two times with Treatment Care Shampoo.
- Apply Treatment Care Conditioner, leave it on for 3 minutes, then rinse thoroughly.
- Dry the hair completely.
- Proceed with color application.
Our suggestion for best results:
- For roots: Use permanent color with 20 volume developer.
- For mid-lengths and ends: Use a toner (demi-permanent or semi-permanent) with 1.9% or lower developer.
Note: If working with light blonde, pastel, or fragile hair, we still recommend waiting 2 weeks for best pigment hold and longevity.
Can I apply toner after the treatment?
Yes but it depends on the toner:
- Dark toner, you can apply it after treatment.
Just make sure to wash the hair first with shampoo and conditioner before applying toner. - Important note: Because Bio Sleek is amino acid-based, it can cause color pigments to fade faster.
Want better, longer-lasting toner results?
For best results, wait 2 weeks before applying toner, especially if:
- Lighter hair (level 5 and up.)
- Highlights or bleaching
- You want your toner to last longer and stay true to tone.
Yes, one session with Bio Sleek can be enough to achieve straight, smooth results on afro or tight curls but only if applied correctly with the right technique, temperature, and number of passes.
Key Points to Consider:
- Application Technique
- Apply Bio Sleek to small, thin sections
- Comb through each section after applying to ensure even saturation
- Processing time is essential for afro or tight curls:
60 minutes under a dryer with a cap,
Then 30 minutes without heat and without the cap.
This allows deeper product penetration and maximum softening of curl structure
2. Flat Iron Technique
- Use nano titanium high-quality flat iron
- Flat iron small sections slowly
- If using 480°F, limit to 8–10 passes
- If using 430–450°F, do 12–18 passes
- Always watch the hair: when it looks like butter and shines, you’re done.
What If the Hair Isn’t Fully Straight After Washing?
No need to redo the full treatment.Simply re-flat iron the missed or puffy sections (4–6 passes) no reapplication or rewashing needed. This can be done in the salon or at home after the first wash.
If the desired result wasn’t achieved, the treatment can be safely repeated.