The Sarah K Carnival Shampoo + Conditioner Duo Post-Chemical 2x300ml brings together the two daily home-care steps of Sarah K's Carnival Limited Edition line, designed for hair after smoothing treatments, coloring, bleaching, or relaxing services. The pairing's signature is a deliberate two-step pH protocol: the Shampoo cleanses gently at pH 5.0-5.5, then the Conditioner seals the cuticle at the strongly acidic pH 3.0-3.5. The same Brazil Nut and Amazonian botanical blend runs through both bottles, with the Shampoo carrying the cocamide-betaine cleansing system and the Conditioner carrying the cationic slip and detangling system. 600ml total, made in Brazil.

What it is

The Carnival Duo is the daily home-care wash-and-condition routine of Sarah K's Carnival Limited Edition line, positioned by the brand as "Intense Nutrition Post-Chemical" -- two bottles formulated to work together as a deliberate two-step pH protocol. Hair's natural pH sits around 4.5-5.5, and chemical services like Brazilian keratin smoothing, coloring, or bleaching leave the cuticle more open and porous. The Shampoo cleanses inside the cuticle-friendly acidic range at pH 5.0-5.5; the Conditioner closes the cuticle strongly at pH 3.0-3.5 as the final wash step. The festive Carnival packaging is a seasonal release; the formula pair sits firmly in the post-treatment-maintenance category.

Key ingredients

Both bottles share the same Brazilian backbone -- Brazil Nut oil, hydrolyzed collagen, silk and wheat amino acids, and the Amazonian botanical cocktail of Copaiba, Carnauba, Cupuacu, and Macadamia. Each bottle adds its functional system:

In the Shampoo (pH 5.0-5.5):

• Cocamide-betaine cleansing system -- Cocamidopropylamine Oxide, Cocamidopropyl Betaine, and Cocamide DEA deliver mild cleansing. SLS, SLES, and sodium chloride are not present in the ingredient list.
• Brazil Nut oil + hydrolyzed collagen + protein-peptide blend -- the shared nutrition layer that does the work during the 2-to-5-minute leave-on.

In the Conditioner (pH 3.0-3.5):

• Cationic conditioning system -- Behentrimonium Chloride + Cetrimonium Chloride. Positively charged molecules bind to negatively charged damaged areas on the hair shaft, delivering slip, detangling, and visible cuticle smoothing.
• Silicone slip system -- Cyclopentasiloxane, Cyclomethicone, Dimethiconol for the silky finish and detangling glide.
• Brazil Nut oil + protein blend + Amazonian botanicals -- the same shared backbone, layered with the cationic system.

The full INCI is printed on each bottle. EU-disclosed fragrance allergens (Linalool, Alpha-Isomethyl Ionone) appear in both.

What you can expect

Immediately after the first wash and condition, hair is detangled and lies smoother, with a polished cuticle finish that catches light. Combing through is dramatically easier than after a shampoo alone. Over a week of paired daily use, the two-step pH protocol works compoundly: the Shampoo at acidic pH cleanses without disturbing the cuticle, the Conditioner at strongly acidic pH closes the cuticle tightly as the routine's final step, and the shared protein-and-Amazonian-botanical blend deposits nutrition with every wash. Smoothing treatments and color tend to stay smoother and truer for longer between salon visits, and hair retains slip and softness without that squeaky-clean stripped feeling that harsher routines can leave behind.

Who it is for

The Duo is for anyone whose hair has been chemically processed -- Brazilian keratin smoothing, the Sarah K La Vie en Gold, salon color, highlights, bleach, or relaxer -- and who wants a complete daily home-care wash routine that supports rather than strips treatment results. It also suits naturally dry, coarse, or thick hair that responds well to intense protein-and-oil nourishment. Fine hair that has not been chemically processed may find both bottles too rich for daily full-protocol use; shorter Shampoo leave-on (2 minutes) and Conditioner on lengths only (avoid scalp) keeps fine textures from feeling weighed down.

Pro tips

• Use the Shampoo first, the Conditioner second. Order matters -- the two-step pH protocol depends on the Shampoo opening at gentle acidic pH and the Conditioner closing at strongly acidic pH.
• Apply the Shampoo from roots to lengths; apply the Conditioner on the lengths and ends only, avoiding the scalp.
• Leave the Shampoo on 2 minutes for routine washes, the full 5 minutes for visibly dry or post-treatment days; leave the Conditioner on the full 5 minutes every time.
• Rinse both with cool or lukewarm water -- preserves the cuticle-sealing pH effect.
• For occasional deep conditioning, leave the Conditioner on 10-15 minutes with a warm towel wrap once every 1-2 weeks.

How to use

1. Wet hair thoroughly with warm water.
2. Apply enough Carnival Shampoo to lather into scalp and lengths. Gently massage and leave on 2 to 5 minutes.
3. Rinse the Shampoo thoroughly with cool or lukewarm water.
4. Squeeze excess water so hair is wet but not dripping.
5. Apply Carnival Conditioner over the full length of the wet hair, avoiding the scalp. Distribute through lengths and ends with fingers or a wide-tooth comb.
6. Leave the Conditioner on for 5 minutes.
7. Rinse the Conditioner thoroughly with cool or lukewarm water.
8. Towel-dry and style as usual.

Safe for daily use.

In short

The daily wash-and-condition Duo from Sarah K's Carnival Limited Edition home-care line, designed for hair after smoothing, color, bleach, or relaxer services. Shampoo + Conditioner work together as a two-step pH protocol -- 5.0-5.5 cleansing, then 3.0-3.5 cuticle sealing. Brazil Nut oil, hydrolyzed collagen, and Amazonian botanicals run through both bottles. 2x300ml flip-cap bottles, 600ml total, made in Brazil.