A polished salon smoothing ritual for sleeker-looking, frizz-controlled hair.
✦ Professional Thermal Smoothing
TRUSS High Liss is a professional thermal sealing treatment created for salon smoothing services. The formula is used to help reduce frizz, soften the look of excess volume, and seal the cuticle through a controlled application, heat processing, rinse, blow-dry, and flat-iron finish.
Designed for colored or virgin hair, this standard High Liss formula is described by manufacturer and retailer materials as formaldehyde-free and compatible with other chemical treatments when professional guidance is followed. Published guidance places expected longevity around 8–10 weeks, depending on the hair, service technique, and maintenance routine.
✦ Smooth-Service Benefits
✦ Frizz-Control Finish Helps create a smoother, more controlled look through a professional thermal sealing process.
✦ Volume Reduction Positioned by TRUSS materials as a smoothing treatment that helps reduce excess volume for a more polished result.
✦ Cuticle Sealing Service Applied with heat and finished with a flat iron to help align the hair surface during the salon service.
✦ Formaldehyde-Free Formula Manufacturer and retailer descriptions identify High Liss as a non-formaldehyde smoothing option.
✦ For Colored or Virgin Hair The standard formula is presented for use on both colored and virgin hair when applied by a trained professional.
✦ Blow-Dry Time Support Brand and retailer materials note reduced blow-dry time as part of the treatment’s smoothing benefits.
✦ Key Ingredients
Cetearyl Alcohol & Cetyl Alcohol Retailer-supplied ingredient lists include these conditioning fatty alcohols commonly used in creamy hair treatments.
Behentrimonium Methosulfate Listed in published retailer INCI data and valued in hair care formulas for a smooth, conditioned feel.
Glycerin Appears in retailer ingredient information as part of the treatment’s creamy salon formula.
Fragrance Components Retailer lists include fragrance along with Linalool, Limonene, Coumarin, and Hexyl Cinnamal; always check the bottle label if sensitivity is a concern.
✦ How to Use
- 01 For professional salon use. Shampoo twice with TRUSS Clarifying Shampoo, or use TRUSS Bidimensional Shampoo when the hair is fragile or damaged.
- 02 Blow-dry hair completely. Apply evenly from nape to crown, keeping approximately 1/2 inch from the scalp, then cover with a plastic cap.
- 03 Process under a hooded dryer according to hair type: about 30 minutes for thin or damaged hair, 45 minutes for medium hair, and 60 minutes for coarse or resistant hair. Rinse thoroughly.
- 04 Brand guidance includes applying TRUSS Amino before the final finish. Blow-dry straight, then flat-iron in thin sections using professional temperature judgment for the hair condition.
