QUICK OVERVIEW
TYPE
Organic Straightening
BEST FOR
Natural or colored hair up to level 8
RESULT
Smooth, straight, polished hair
LASTS
Up to 6 months
WATCH THE BIO SLEEK APPLICATION
See the full Bio Sleek process from application to final result. This tutorial helps stylists understand sectioning, saturation, rinsing, blow-drying, and flat iron technique.
Work in fine, even sections for better saturation and smoother results.
Bio Sleek is rinsed and shampooed out before blow-drying.
A professional titanium flat iron helps create stronger results.
WHO BIO SLEEK IS BEST FOR
Use Bio Sleek when the client’s goal is straight, smooth, long-lasting hair.
- Clients who want straight, smooth hair with long-lasting results
- Natural or colored hair up to level 8
- Wavy, curly, coarse, or frizzy hair
- Hair that is resistant to other straightening systems
- Root touch-up maintenance
NOT IDEAL FOR
Choose another Nano Lamination system if the hair is fragile, highly bleached, or the client wants to keep curls.
- Highly bleached or fragile hair by itself
- Extremely damaged, stretchy, or breaking hair
- Clients who want to keep their natural curls
- Hair that cannot safely tolerate flat iron heat
use the Bio Sleek + Nano Silky blonde system.
Understanding Bio Sleek
These are the most common questions stylists ask before choosing Bio Sleek for their clients.
What Is Bio Sleek?
Bio Sleek is a professional organic straightening treatment designed to smooth frizz, straighten resistant hair, and leave the hair soft, shiny, and manageable.
It works with an amino-acid based system that helps transform curly, wavy, frizzy, or hard-to-control hair into a smoother, straighter finish. Bio Sleek is ideal for clients who want long-lasting straight results with less daily styling, less frizz, and easier blow-drying.
Bio Sleek vs Keratin
Bio Sleek is not the same as traditional keratin treatments. Bio Sleek is an organic amino-acid based straightening treatment. Many keratin treatments are sealed into the hair differently and often require more aftercare restrictions.
With Bio Sleek, the product is rinsed before blow-drying and flat ironing, creating a cleaner and more comfortable service.
After Bio Sleek, clients can swim, wash their hair, use their regular shampoo routine, and color or highlight the hair when needed. With many keratin treatments, clients are often advised to avoid pool/ocean water, use sulfate-free shampoo, and do color or highlights before the treatment because it may reduce the keratin result. Bio Sleek offers more flexibility for the stylist and the client while giving smooth, straight, long-lasting results.
Bio Sleek vs Japanese Straightening
Bio Sleek is not the same as traditional Japanese straightening.
Japanese straightening is a strong chemical service that must be timed carefully. If left on too long, the hair can become weak, stretchy, gummy, or break. Highlights are not recommended after Japanese straightening because the hair may break.
Bio Sleek gives stylists a safer, more controlled, and more flexible process with a pleasant smell and a cleaner salon experience. It is a modern alternative for smooth, straight, long-lasting results, and highlights can be done after the treatment when needed.
How Long Does It Last?
Bio Sleek results can last up to 6 months, depending on the client’s hair type, maintenance routine, and aftercare.
Most clients only need a root retouch as new growth comes in, instead of redoing the full length every time.
Correct technique, aftercare, and home maintenance help keep the results smooth and polished for longer.
One-Time Correction After the First Wash
One of the biggest advantages of Bio Sleek is the option to reinforce the result after the first wash
If the hair is not fully straight after the first wash, bring the client back for a one-time correction. There is no need to wash the hair again or reapply the treatment. Simply dry the hair completely and re-flat iron only the areas that need extra straightening.
No need to reapply the treatment or redo the full service.
Best for: missed spots, resistant areas, or puffy sections after the first wash.
Color + Bio Sleek Guide
Use this guide when working with color, toner, blonde hair, or fragile level 8+ hair.
Should I color before or after Bio Sleek?
Best control: Bio Sleek first → then color or toner.
Bio Sleek is amino-acid based and uses heat, so it can slightly lift or fade color, especially on previously colored or light hair.
If you color before Bio Sleek, the final shade may become lighter or warmer.
Can I color the same day after Bio Sleek?
Yes, but follow the correct steps and always check the hair condition first.
After Bio Sleek, wash with Treatment Care Shampoo, apply Treatment Care Conditioner, rinse, and dry the hair completely before color.
For roots: use permanent color with 20-volume developer.
For mid-lengths and ends: use toner, demi, or semi with 1.9% or lower developer.
How should I tone after Bio Sleek?
Dark or deeper toners can usually be applied right after the treatment on clean hair.
Always shampoo and condition before applying toner.
For light, pastel, fashion tones, level 8+ blondes, or heavily highlighted hair, it is better to wait 2 weeks when possible so the pigment lasts longer.
What about blonde, bleached, or fragile hair?
For highly bleached, fragile, porous, or level 8+ hair, Bio Sleek alone may not be the best choice.
Use Bio Sleek + Nano Silky for a softer straightening approach on blonde or fragile hair.
Choose Nano Silky when the client wants smoothing and frizz control without stronger straightening.
View Blonde Hair Guide →How to Use Bio Sleek Correctly
Follow the correct professional steps for better saturation, smoother results, and long-lasting straightening.
Wash Hair
Wash the hair 2 times with Nano Lamination Clarifying Shampoo.
- Remove buildup, oils, silicones, and impurities.
- Do not use conditioner before applying Bio Sleek.
Dry Hair 100%
Blow-dry the hair completely before applying the treatment.
- Hair must be fully dry.
- No moisture should be left inside the hair.
Apply Bio Sleek
Shake well before use. Apply Bio Sleek in small sections, starting about ¼ inch from the scalp.
- Apply with a brush.
- Work clean and controlled section by section.
Comb Through
Comb each section after applying to distribute the product evenly.
- Use a fine-tooth comb.
- Make sure the hair is evenly saturated.
Process
Process under heat with a shower cap. Timing depends on hair type, texture, and resistance.
See Processing Guide below for full timing.
Rinse / Shampoo Out
Rinse the hair thoroughly and remove the product completely.
- Shampoo when needed for lighter or less curly hair.
- For thick, curly, or resistant hair, rinse thoroughly without shampoo before flat ironing.
Blow-Dry 100%
Blow-dry the hair completely before flat ironing.
- No moisture should be left in the hair.
- Use tension to create a smooth base before ironing.
Flat Iron
Flat iron in very small sections with a professional titanium flat iron.
- Work slowly with steady tension.
- Adjust heat based on hair type and condition.
- See Flat Iron Guide below for temperature and passes.
The final result depends on section size, even saturation, processing time, blow-dry tension, flat iron quality, temperature, and number of passes.
Technique + Special Situations
Professional education to help stylists understand timing, flat iron technique, resistant hair, and correction after the first wash.
Hair Type + Processing Time Guide
Bio Sleek must process under heat. Timing depends on hair type, texture, and resistance.
Normal / Less Resistant Hair
30 min with cap under heat
20 min without cap under heat
10 min cool down without heat
Total: 60 minutesThick, Curly, or Resistant Hair
30 min with cap under heat
30 min without cap under heat
15 min cool down without heat
Total: 75 minutesFlat Iron Temperature + Passes Guide
The number of flat iron passes depends on the temperature you are using and the condition of the hair.
Thick
Medium
Thin 480°F
450°F
410°F Slow
Very Slow
Slow 5–7
12–15
10–12
Thick / Medium
Thin / Medium
Thin 480°F
450°F
410°F Slow
Very Slow
Slow 5–7
12–15
10–12
Thick / Medium
Thin / Medium
Thin 480°F
450°F
410°F Slow
Very Slow
Very Slow 5–8
12–15
10–12
Thick
Medium
Thin 450°F
410°F
390–410°F Slow
Slow
Slow 10–12
10–12
8–10
Hair Not Fully Straight After First Wash?
Most of the time, this is about technique, not product.
Ask Yourself
- Did you apply in small enough sections and comb through?
- Did you flat iron in very small sections, slowly, with enough passes?
- Is the hair low-porosity, very resistant, or very curly?
If the client has washed many times and the hair looks almost like before, evaluate whether a new full Bio Sleek service is needed.
How Do I Straighten Afro or Tight Curls with Bio Sleek?
Yes — one session can be enough, but afro and tight curls need extra time, smaller sections, and stronger technique.
Key Rules
- Apply in very small sections and comb through each section.
- Use the resistant hair processing time: 30 min with cap under heat + 30 min without cap under heat + 15 min cool down.
- Use a professional titanium flat iron with the correct temperature for the hair condition.
- Work slowly in tiny sections until the hair looks smooth, shiny, and sealed.
Bio Sleek: Common Mistakes to Avoid
Most Bio Sleek issues happen from technique, not the product. Use this guide to help stylists avoid the most common application and flat iron mistakes.
Uneven Product Saturation
If the product is not applied evenly, some areas may stay puffy, wavy, or less straight after the first wash.
Sections Are Too Big
Large sections make it harder for the product to saturate the hair and harder for the flat iron to seal the treatment evenly.
Hair Is Not 100% Dry Before Ironing
Moisture left inside the hair can weaken the final result and prevent the treatment from sealing correctly.
Using the Wrong Flat Iron
A weak flat iron may not keep stable heat, and the treatment may not seal properly into the hair.
Too Many Passes on Fragile Hair
Over-ironing fragile, bleached, or damaged hair can create dryness, stress, or damage.
Choosing the Wrong Client
Bio Sleek is not ideal for extremely damaged, stretchy, breaking hair, or clients who want to keep their natural curls.
Roots + Combination Services
Professional ways to maintain Bio Sleek results, protect the lengths, and customize the service based on the client’s hair condition.
Roots Only
Full Length
Roots vs Full Length
Use when: Client is coming back for maintenance and you need to decide if you should treat only the roots or the full length.
Every 3–6 months, depending on hair growth and how curly the regrowth is.
Maximum 2–3 times per year on the same hair, only if the hair is still healthy.
Bio Sleek on Roots
Nano Silky on Lengths
Bio Sleek Roots + Nano Silky Lengths
Use when: Client wants permanent straight roots and soft, shiny, frizz-free lengths.
How to Do It
- Bio Sleek: apply on new growth / root area, starting about ½ inch from the scalp.
- Nano Silky: apply on mid-lengths and ends.
- Process both products according to the timing chart.
- Rinse completely, blow-dry 100%, and flat iron in thin sections.
Lengths = smooth, soft, shiny, frizz-free
Bio Sleek on Roots
Nano Mousse on Lengths
Bio Sleek Roots + Nano Mousse Lengths
Use when: Client wants permanent straight roots and 12–16 weeks of smoothing on the lengths.
How to Do It
- Step 1: do Bio Sleek on roots / new growth only.
- Rinse Bio Sleek completely from the roots.
- Step 2: towel-dry hair until damp, not dripping.
- Apply Nano Mousse on mid-lengths and ends.
- Process about 20 minutes, blow-dry 100%, then flat iron 4–6 passes.
Lengths = smooth, soft, frizz-free for 12–16 weeks
Ready to Work with Bio Sleek?
Give your clients smooth, straight, long-lasting results with the right product, correct technique, and professional support.