TRUSS
Uso Obrigatório Hair Mask
Uso Obrigatório Hair Mask
All taxes & import duties paid by us. Nothing to pay on delivery.
VAT includedTracked DHL shipping from BrazilShipping
- Who it's for
- For damaged, dry and chemically treated hair of every texture, including bleached hair that feels weak and brittle, on the reconstruction day of the Brazilian hair schedule.
- Key ingredients
- Nano Reconstruction, Amino acids, Jojoba esters, sunflower seed wax and shorea butter
- How to use
- After shampooing, gently squeeze out the excess water.
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Applied automatically at checkout
- Authentic, from Brazil
- Checked & packed by hand
- Tracked DHL shipping

About this product
Uso Obrigatório Hair Mask
Deep repair for hair that has been through too much: TRUSS's Uso Obrigatório mask seals the cuticle and restores flexibility and elasticity to hair weakened by heat, brushing and bleaching, for soft, smooth, shiny hair on the reconstruction day.
Uso Obrigatório means "a must" in Portuguese: it is TRUSS's line for damaged, dry hair, with immediate reconstruction, deep hydration and protection from everyday damage. Its floral-fruity scent comes with a technology that keeps releasing fragrance through the day on contact with the air.
The new Uso Obrigatório mask deeply repairs hair weakened by physical damage, like heat and brushing, and chemical damage, like bleaching. It seals the cuticle and brings back the right flexibility and elasticity. With Nano Reconstruction and amino acids, it leaves hair soft, smooth, shiny and protected. With the full Uso Obrigatório routine, up to 87% less breakage (compared with hair washed with a shampoo without conditioning agents).
Why you'll love it
- Deep repair for hair weakened by heat, brushing and bleaching
- Seals the cuticle and restores flexibility and elasticity
- Less frizz and easier styling with continued use
- Helps protect colour from fading
Key ingredients
- Nano Reconstruction – helps rebuild the hair fibre and seal the cuticle.
- Amino acids – arginine, glycine, serine, proline and other amino acids that help restore strength and elasticity.
- Jojoba esters, sunflower seed wax and shorea butter – emollients that help replenish lipids and soften the strands.
How to use
- After shampooing, gently squeeze out the excess water.
- Apply to the lengths and ends, massaging and detangling as you go.
- Leave on for 5 minutes, then rinse well.
Use 1 to 3 times a week. For a full treatment, wash with the TRUSS Uso Obrigatório Shampoo, spray the TRUSS Uso Obrigatório Reconstructor Spray, then apply the mask section by section.
Your Brazilian hair schedule
The Brazilian cronograma capilar rotates three treatments: hydration, nutrition and reconstruction. This is the Reconstruction step: it helps restore strength and resistance to hair weakened by heat, brushing and chemical treatments.
Who it's for
For damaged, dry and chemically treated hair of every texture, including bleached hair that feels weak and brittle, on the reconstruction day of the Brazilian hair schedule.
Product details
- Brand: TRUSS · Line: Uso Obrigatório
- Size: 180g
- Hair types: All hair types, especially damaged, dry and chemically treated hair
- Hair schedule: Reconstruction
- Scent: floral fruity
- Cruelty-free: no TRUSS product is tested on animals
- Full ingredient list: Aqua, Cetearyl Alcohol, Propylene Glycol, Cetyl Alcohol, Isopropyl Myristate, Stearamidopropyl Dimethylamine, Jojoba Esters, Cetrimonium Chloride, Stearyl Alcohol, Parfum, Helianthus Annuus (Sunflower) Seed Wax, Dicetyldimonium Chloride, Bis-Cetearyl Amodimethicone, Lactic Acid, Ceteareth-20, Behenyl/Stearyl Aminopropanediol Esters, Amodimethicone, Shorea Stenoptera Seed Butter, Phenoxyethanol, Dipalmitoylethyl Hydroxyethylmonium Methosulfate, Caprylyl Glycol, Behenamidopropyl Dimethylamine, Crambe Abyssinica Seed Oil, C11-15 Pareth-7, Disodium EDTA, Trideceth-12, Laureth-9, Glycerin, Polyquaternium-113, Polyglycerin-3, Ceteareth-7, Ceteareth-25, Cocos Nucifera (Coconut) Oil, Sodium PCA, Sodium Lactate, Arginine, Gardenia Taitensis Flower, Aspartic Acid, PCA, Glycolic Acid, Glycine, Alanine, Tocopherol, Serine, Valine, Threonine, Proline, Isoleucine, Phenylalanine, Histidine, Sodium Metabisulfite, Citric Acid. Formulas may be updated by the brand; the list on your pack is the reference.
- For external use only. Avoid contact with the eyes; if contact occurs, rinse well with water. Do not apply to an irritated or broken scalp. Stop using if sensitivity occurs. Keep out of reach of children.
Frequently asked questions
Does it replace the conditioner?
Yes, on mask days: it is a conditioning mask, so you can use it after shampooing instead of the TRUSS Uso Obrigatório Conditioner.
Can I use it on bleached hair?
Yes. It is made to repair hair weakened by chemical damage such as bleaching, as well as by heat and brushing.
How do I finish the routine?
After rinsing, a few drops of the TRUSS Uso Obrigatório Reconstructing Hair Oil on the lengths and ends seal the strands and add shine.
Shipping, duties & returns
Tracked DHL shipping from Brazil, 15–20 business days. All import duties and taxes are paid by us, so there is nothing to pay on delivery. Sealed products can be returned within 14 days.
Disclaimer: For external use only. Patch test before use and discontinue use if irritation occurs. Individual results may vary. Product packaging is labelled in Portuguese; the instructions and ingredient information are on this page, in English. Our products are sourced in Brazil, in the brands' original packaging, and are regularised with ANVISA (Agência Nacional de Vigilância Sanitária), Brazil's national health authority, under the applicable framework for each product category. See our full Disclaimers & Important Information.
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