Pure Keratin Professional Set: Formaldehyde‑Free Keratin Treatment + Clarifying Shampoo 100 ml | In-Depth Review & How-To Guide

Introduction

The pursuit of smooth, frizz-free hair without harsh chemicals is a challenge many hair care enthusiasts face. Traditional keratin treatments often incorporate formaldehyde or formaldehyde-releasing agents, which raise safety concerns for both users and stylists. That’s precisely why the Set Keratin Treatment Professional | Formaldehyde‑Free + Clarifying Shampoo 100 ml from Pure-Keratin stands out in the landscape of hair smoothing systems.

In this deep dive, we’ll look at what this product offers, how it works, usage steps, benefits, comparisons to alternatives, tips for maximizing results, and address common questions. Whether you're a stylist or someone wanting salon-level hair care at home, this guide will help you understand if this keratin kit is right for you.

Product Overview & Key Claims

The Pure-Keratin set is positioned as a “**professional keratin treatment kit**” that is **formaldehyde-free** and paired with a “clarifying shampoo” (100 ml). According to the product page, here are the main claims and features:

• 100% formaldehyde-free (no keratin formaldehyde) — making it safer for in-home usage.
• Produces salon-quality results at home: smooth, frizz-free hair.
• Suitable for all hair types, including color-treated or chemically processed hair.
• Long-lasting results — 3 to 4 months, depending on hair type and aftercare.
• Comes with a clarifying shampoo to remove buildup before application.
• Promoted as a safe, non-toxic alternative to treatments containing formaldehyde. 

The price is listed at **USD $79.98** (discounted from $99.98) at the time of review. The ingredients for the keratin treatment include water, glycerin, cetearyl alcohol, hydrolyzed keratin, silicones (dimethicone, cyclopentasiloxane), and common conditioning agents, among others. Notably, it does not list formaldehyde, which is part of its selling point.

Why Go Formaldehyde‑Free?

Risks and concerns associated with formaldehyde in hair treatments

Formaldehyde (and formaldehyde-releasing compounds) have been used historically in keratin treatments to “lock in” the straightened effect. However, formaldehyde is classified as a carcinogen by various health bodies and can pose risks including respiratory irritation, allergic reactions, and long-term health concerns when inhaled or absorbed in significant amount.

Many regulatory bodies and health-conscious consumers now look for safer alternative formulas. Choosing a product labeled as formaldehyde-free can reduce those risks, especially in poorly ventilated spaces or repeated usage scenarios.

Challenges of formaldehyde-free formulas

The challenge with formaldehyde-free keratin treatments is that they must still deliver effective smoothing, longevity, and manageability without relying on strong cross-linking chemicals. Some may use glyoxylic compounds, carbocysteine, or milder heat-activated agents to bond keratin or create smoothing effects. Because the chemical bonding might be weaker, the durability and efficiency of the process may be more dependent on user technique, hair porosity, and aftercare.

Pure-Keratin’s “Formula 0%” approach suggests they’ve optimized the blend of keratin, conditioning agents, and silicone-based smoothing agents to deliver acceptable performance while keeping safety in view.

How the Treatment Works (Mechanism)

While the product page doesn’t go into deep scientific mechanism, based on known principles of keratin-smoothing systems, here is how such a kit is likely designed to work:

1. Clarification / Buildup Removal: The included clarifying shampoo removes residues (e.g., silicones, oils, pollution) so that the keratin molecules can adhere more uniformly to hair fibers.
2. Penetration of Keratin & Conditioners: The formula may contain hydrolyzed keratin, which are smaller protein fragments that can penetrate damaged hair cuticle layers to repair internal structure and reinforce bonds.
3. Heat Activation / Sealing: Using a flat iron (high heat) helps seal the keratin and smoothing agents into the hair shaft, flattening cuticles, and creating a smooth outer layer. The hair fiber becomes more aligned and reflective.
4. Cuticle Smoothing & Protective Barrier: The silicones (dimethicone, cyclopentasiloxane) and conditioning cationic agents in the blend help form a smooth protective film on the hair, reducing friction and repelling humidity.
5. Maintenance & Bond Stability: With proper aftercare (e.g. sulfate-free shampoos, reduced washing frequency), the bonded smoothing effect can last for months before gradually fading as the bonds break down and hair grows.

Because there's no formaldehyde crosslinking, the bonding is gentler. That means that technique (flat iron temperature, number of passes, hair dryness) and aftercare become more critical to achieving optimal results.

Step-by-Step Usage Guide

To get the best results from this keratin system, follow the steps carefully. The product page provides a usage protocol (summarized and annotated below).

1. Wash & Prepare Hair

• Begin by shampooing your hair using the clarifying shampoo included (or an equivalent strong clarifying formula). This removes oils, residue, or silicones that could block penetration.
• Rinse thoroughly and towel-dry. Ensure hair is fully dry before applying the treatment, as moisture can interfere with bonding.

2. Apply the Keratin Treatment

• Section your hair into small, manageable panels.
• Using a brush or applicator, apply the keratin formula evenly from roots to ends, making sure each strand is coated. Don’t over-saturate; you want absorption, not dripping.
• Let the formula sit for **20 to 30 minutes**, allowing it to penetrate the hair shaft.

3. Blow-Dry & Straighten

• Blow-dry the hair completely, using a round brush or paddle brush to help smooth the cuticle.
• Then, use a flat iron (temperature between **190–230 °C / 380–450 °F**) to seal the keratin into the hair. Pass small sections multiple times until hair is shiny and smooth.
• The number of passes per section may vary depending on hair texture, porosity, and damage level.

4. Wait 48 Hours (No Washing)

After the heat sealing, **do not wash or wet your hair for 48 hours**. This waiting period is crucial to allow the keratin and smoothing agents to fully bond. During this time, avoid tying hair, using clips, or letting hair touch around collars or damp surfaces.

5. Rinse & Maintain

• After 48 hours, you may rinse your hair using a **sulfate-free shampoo** and a compatible conditioner. Sulfates can strip the smoothing coating prematurely.
• To maintain the results:
  • Wash less often, use cold or lukewarm water.
  • Use masks or deep conditioning weekly (e.g. Pure Keratin Masks)
  • Avoid saltwater or heavy chlorinated pool exposure without protection.

Tips for Best Results

• Divide hair into fine sections for more even application.
• Don’t rush flat ironing—slow, steady passes are better than fast passes.
• Match flat iron temperature to hair’s tolerance; damaged or bleached hair may require lower heat settings.
• Ventilation is still important even with formaldehyde-free treatments—use in a well-ventilated room.

Before & After, Expected Performance, and Realistic Expectations

What You Should Expect Immediately

After completing the treatment and following the 48-hour wait, you should start to see:

• Reduced frizz and a smoother hair surface
• More manageability and easier styling
• Increased shine and reflectivity

How Long the Effects Last

According to Pure-Keratin, results may last between **3 to 4 months**, depending on hair type, porosity, damage level, washing habits, and aftercare. Hair growth (new growth) and cumulative abrasion or washing will gradually reduce the effect over time.

Factors That Affect Longevity

• How often you wash your hair (more frequent washing = faster fade)
• Use of shampoos with harsh sulfates or clarifiers
• Exposure to sun, saltwater, chlorine, humidity
• Quality of heat sealing (number of flat-iron passes, temperature)
• Hair damage, porosity, and how well the hair binds keratin in the first place

Limitations & Trade-offs

Because the formula avoids formaldehyde, it may not deliver the same extreme straightening or ultra-long durability that some stronger (and harsher) treatments can offer. For extremely coarse, tightly coiled, or highly damaged hair, multiple passes or complementary smoothing systems might still be needed. Users expecting a “permanent straight perm” effect should calibrate expectations: this is a smoothing and frizz-control system, not a permanent change.

Comparison With Other Keratin Treatments

Let’s compare Pure-Keratin’s formaldehyde-free kit with common alternatives in the keratin / smoothing category.

Traditional Formaldehyde / Formaldehyde-Releasing Treatments

• Often stronger cross-linking action = longer lasting straightening effect
• Risk of fumes, odors, and potential health concerns in enclosed spaces
• Often higher pricing in salons due to safety equipment and ventilation needs
• Possibly harsher on already damaged, bleached, or fragile hair

“Low-Formaldehyde” or Glyoxylic / Cysteine Treatments

• Use milder aldehyde-based or derivative compounds (glyoxylic acid, cysteine) which may produce smoothing under heat
• Often marketed as safer but may still have mild fumes or require ventilation
• Durability varies, sometimes lasting 2–3 months

Other Formaldehyde-Free Kits (Competitors)

Many brands now offer formaldehyde-free smoothing kits. Some focus more on silicone/film forming agents rather than deep keratin integration. The challenge is balancing immediate smoothness with lasting effect. Compared to many of these, Pure-Keratin’s positioning is as a more “professional-level” kit (versus purely consumer-level).

Why Choose the Pure-Keratin Kit?

• Truly formaldehyde-free (0% formula) — fewer safety concerns and no harsh fumes
• Designed to be a complete kit (includes clarifying shampoo) for better results
• Intended for both home users and professionals, bridging ease-of-use with high performance
• Comparative cost-effectiveness considering its results and durability (versus repeated salon treatments)

Tips & Best Practices for Stylists vs Home Users

For Salon or Professional Stylists

• Test on a small strand first, especially if the client’s hair is fragile or highly processed.
• Ventilation is still important. Use fume extractors if possible—even formaldehyde-free formulas may release volatilizing compounds under high heat.
• Adjust your flat iron technique based on hair type: coarse hair may need more passes, fine hair less.
• Advise clients on strict aftercare (sulfate-free regimen, reduced washing frequency) for maximizing longevity.
• Offer a “maintenance touch-up” service at 2–3 month intervals, focusing on regrowth zones or fading areas.

For Home Users

• Do it in a well-ventilated bathroom or near a window or fan.
• Use a thermometer on your flat iron to ensure you really hit the 190–230 °C range—but don’t overheat fragile hair.
• Do not rush: section hair finely, take time to iron properly.
• Invest in quality sulfate-free hair care post-treatment.
• Be cautious with swimming pools or sun exposure—use protective sprays or hats.

Aftercare: Maintaining and Extending Results

Aftercare is just as critical as the initial application. Without good upkeep, even a strong treatment will fade prematurely. Here are recommended strategies:

Use Gentle, Sulfate-Free Products

Shampoos containing sodium lauryl sulfate (SLS), sodium laureth sulfate (SLES), or strong clarifying agents can strip away the smoothing film. Use gentle, sulfate-free shampoos and conditioners specifically formulated for treated hair. Pure-Keratin recommends their “daily Shampoo” (sulfate-free) and “daily Conditioner” to maintain hydration and extend the smoothing effect.

Deep Conditioning / Weekly Masks

Use a hair mask once a week to replenish moisture, repair damage, and maintain shine. Pure-Keratin suggests using their mask line weekly. Avoid heavy protein overload or overly stiff masks—balance is key.

Avoid Harsh Environmental Exposure

• Wear a swim cap when swimming, or soak hair in freshwater first to reduce chlorine uptake.
• Use UV protection sprays or hats if in prolonged sun exposure.
• Avoid overuse of salt sprays, heavy styling waxes, or buildup products.

Limit Heat & Mechanical Stress

While your hair is smoother, still treat it gently: avoid excessive heat styling, tight elastics, or aggressive brushing, especially when wet.

Touch-Ups & Maintenance Sessions

Even with the best care, smoothing effects gradually fade. Schedule a touch-up or a “mini-treatment” for regrowth zones or fading areas between full treatments. This helps prolong an overall uniform look.

Potential Risks, Contraindications & Precautions

While the Pure-Keratin kit is marketed as safer because it’s formaldehyde-free, no treatment is risk-free. Here are things to watch out for:

Allergies / Sensitivities

The formula contains fragrance (parfum) and preservatives (methylchloroisothiazolinone / methylisothiazolinone) which are known to be allergenic to some users. Always do a strand test or patch test before full application.

Hair Condition & Prior Treatments

Very weak, brittle, or severely over-processed hair may not tolerate repeated heat or chemical stress. Be conservative with temperature and number of passes. If hair has had multiple treatments (bleaching, perms), consider a milder approach or stronger reconstructive conditioning beforehand.

Flat Iron Heat Damage

Over-application of heat (too many passes, too high temperature) can cause thermal damage, breakage, or dryness. Always monitor and calibrate your iron.

Ventilation & Safety

Even though the formula is formaldehyde-free, heated ingredients or volatile compounds can still produce fumes or odors. Use in a well-ventilated space. Avoid inhaling the mists directly. Wear gloves and protect skin if you're sensitive.

Eye Contact & Skin Contact

Avoid contact with eyes. If it occurs, rinse thoroughly with water. Use caution when applying close to scalp or sensitive skin. Clean any drips immediately.

Pregnancy, Respiratory Conditions, Sensitive Users

Although safer formulations reduce risk, users with asthma, respiratory sensitivities, or during pregnancy should be cautious. Consult a dermatologist or health professional if uncertain.

Frequently Asked Questions (FAQ)

Is this keratin treatment truly formaldehyde-free?

Yes — the product is branded as “Formula 0%,” indicating no keratin formaldehyde. That said, always verify ingredient labels and check for any regulatory updates.

How long will the results last?

Typically, results last between 3 to 4 months, depending on hair type and aftercare practices. Some users may experience fading earlier if hair is washed often, exposed to chlorine/sun, or uses harsh shampoos.

Can I use it on colored or chemically treated hair?

Yes — Pure-Keratin states their formula is safe for color-treated hair and chemical treatments. Even so, if your hair is extremely fragile or repeatedly processed, proceed carefully.

Can I apply this treatment by myself at home?

Absolutely — it is marketed for at-home use with professional results. Just follow the instructions carefully, use good technique, and take your time.

How much coverage will 100 ml of treatment cover?

Coverage depends on hair length, thickness, and porosity. For mid-length to long hair, you may need additional product or consider the larger kit size for better coverage.

Can I rewash or wet my hair before 48 hours?

No — it’s critical to avoid washing or wetting hair for 48 hours to allow the formula to bond properly. Doing so prematurely may weaken or wash out the effect.

Case Studies & Hypothetical Results

While Pure-Keratin’s product page includes promotional images, we can consider hypothetical scenarios to illustrate performance under different hair types:

Case 1: Medium-porosity, color-treated, wavy hair

A user with color-treated, wavy hair applies the full protocol. After 48 hours, hair is smoother, frizz reduced, and wind-blown waves are easier to manage. The smoothing effect lasts ~3 months, with gentle fade in ends. With consistent aftercare, user reports extended lifespan to around 4 months.

Case 2: Coarse, coarse-textured, naturally curly hair

A coarse, tightly coiled hair type may require more flat iron passes or potentially a second session for maximum straightening. The result is a smoother, more elongated curl or wave, though full stick-straight effect may not be achieved in one session. The durability may be closer to 2.5–3 months with optimal care.

Case 3: Fine / lightweight hair

Fine hair can benefit from smoothness and reduced frizz, but may not hold the treatment as long. Lower flat iron temperature and fewer passes help avoid damage. The user may need to reapply or touch up earlier (2–3 months). But the hair remains bouncy, shiny, and manageable.

Case 4: Highly porous, damaged hair

In hair that is heavily damaged or porous, absorption may be uneven, and overuse of heat may risk breakage. A preliminary repair / bond-rebuilding treatment is advised before applying. If done carefully, smoothing and improved manageability will still be seen, but with more gradual fade.

Pros & Cons Summary

Advantages

• No formaldehyde: safer, less pungent fumes, better user comfort.
• Professional-grade kit for both home and salon use.
• Good durability (3–4 months) when properly maintained.
• Includes clarifying shampoo, making it a complete system.
• Suitable for color-treated hair.
• Less chemical stress versus stronger treatments.

Potential Drawbacks

• May not match the strongest straightening levels of formaldehyde-based systems.
• Technique-sensitive — user error, uneven passes, or poor aftercare reduce results.
• 100 ml may be insufficient for long or very thick hair.
• Contains fragrance and preservatives (possible allergens).
• Not a permanent change — gradual fade over time.

SEO & Marketing Angle (for Pure-Keratin.com)

From an SEO perspective, a blog post like this can help Pure-Keratin’s site attract organic traffic by targeting key search queries such as:

• “formaldehyde-free keratin treatment kit”
• “best keratin treatment at home”
• “pure keratin treatment review”
• “keratin smoothing without formaldehyde”
• “how to apply keratin treatment at home”

Internally linking to product pages, relevant categories (e.g. Keratin Treatment category), and related blog posts (e.g. “Before & After” gallery, “How to choose keratin strength”) helps distribute link equity and improve site architecture. Also, including high-quality images (before/after, usage steps) and possibly video content can enhance user engagement and dwell time.

Ensuring the page is mobile-friendly, fast-loading, and includes structured markup (e.g. FAQ schema) will further boost search visibility.

Conclusion & Recommendation

The **Set Keratin Treatment Professional | Formaldehyde‑Free + Clarifying Shampoo 100 ml** from Pure-Keratin presents a compelling option for those who want salon-level smoothing without the risks of formaldehyde. It offers a balanced middle ground: safer chemistry, adequate durability, and a full kit experience.

While it may not deliver the absolute extreme straightening of the harshest salon formulas, for most users seeking manageable, shiny, frizz-reduced hair, it is an excellent choice—especially when proper technique and aftercare are applied.

If you choose to use it, take your time during application, respect the 48-hour no-wash window, and commit to ongoing care with gentle products. The reward: lasting smoothness, reduced frizz, and healthier-looking hair without compromising safety.

Ready to try it yourself? You can view or purchase the kit here: Set Keratin Treatment Professional | Formaldehyde‑Free + Clarifying Shampoo 100 ml