Wella - Smoothfiller Demi-Permanent Keratin Smoothing Treatment
Wella - Smoothfiller Demi-Permanent Keratin Smoothing Treatment
SKU:29255
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Demi-permanent smoothing treatment to smooth, fill and restructure hair
- Smoother hair, anti-frizz effect, faster and easier blow dry
- Salon exclusive service. Worry free service experience – low fume service
- Only 8 ingredients, vegan, fragrance free, silicone free, dermatologically tested
- No post restrictions for clients; hair can be washed right after. Colour refreshment with Colour Touch is possible during the same appointment.
Usage instructions:
Step 1 preparation: Shampoo hair. Do not use a conditioner. Detangle and pre-dry the hair until 80% dry.
Step 2 product application and development: Wear gloves. Weight product into the bowl. Guidance amount per service: 100g for mid-long hair. Apply product on hair with a brush. Work with 2cm deep sections. Start from the nape, about 0.5 cm away from the roots. Make sure to apply product evenly on hair. Do not apply product on scalp. Do not use heat or cover the hair. Develop for 20 minutes. Emulsify and rinse the hair. Do not use shampoo, conditioner or leave- in products.
Step 3 thermal activation: Blow dry hair straight until 100% dry. Straighten the hair with a straightening iron working in small sections, using 6 to 12 passes with 180 – 230c heat depending on the hair type and condition.
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Wella Professionals Smoothfiller Demi Hair Treatment
Wella Professionals Smoothfiller Demi Treatment is a professional smoothing treatment designed to improve hair texture, reduce frizz and restore softness to dry, coarse or unruly hair. Developed for salon-quality performance, the formula helps smooth the hair fibre while improving manageability and shine.
The Smoothfiller technology works by helping to fill and smooth uneven areas of the hair cuticle, creating a sleeker hair surface that reflects light more evenly. This helps hair appear smoother, shinier and easier to manage while reducing frizz and flyaways.
Formulated with conditioning agents that nourish and soften the hair fibre, the treatment helps improve styling control while protecting the hair from humidity and environmental stress. Hair feels smoother, softer and more manageable after use.
Professional smoothing treatments in the Wella Smoothfiller collection are designed to improve hair texture, control frizz and enhance shine while maintaining natural movement and softness.
Ideal for frizz-prone, coarse or difficult-to-manage hair, Smoothfiller formulas help create a sleeker hair surface while maintaining lightweight softness and long-lasting smoothness.
Trusted by salons worldwide, Wella Smoothfiller delivers professional smoothing care designed to enhance shine, improve hair manageability and maintain polished styles.
For context: I have fine, curly hair with around 50% highlights. This treatment is safe for me at 180°C with 6-8 passes for thermal activation. I’ve previously tried both permanent straightening and keratin. They worked well, but were a lot of fuss, so I was excited to try this one. Overall, it does work, if you consistently blow dry and style your hair after each wash. Even just a blow dry (without straighteners) leaves hair noticeably smoother, neater, more manageable, and the effect fades gradually. However, what puts me off is the smell. It’s true that there’s no noticeable odour when the treatment is freshly applied. But every time you wash your hair after or sweat even briefly at night, you get a broccoli-like smell, which is definitely not flattering. I’m currently on wash 7 (I wash every 2 days and double shampoo due to an oily scalp), and it’s still there. If you’re going on a beach holiday, be prepared smelling like a pond every time you go for a swim. I’m still undecided on whether I would use it again. As someone who struggles with extreme frizz in the UK climate and has tried virtually everything, I am genuinely happy with the smoothing results you get with styling. But there are quite a few drawbacks, especially for clients who don’t style their hair often and who will absolutely notice and dislike the smell.
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