Three-panel graphic Great Hair Days showing NuProtect primer: 75% reduced frizz; 93% less combing force; 73% less frizz at 24h

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Hair You’ll Obsess Over

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New at NULASTIN

Hair You’ll Obsess Over

SKIMM Exclusive Offer

One Step Wonder

30% OFF with Code SKIMM30

New at NULASTIN

Hair You’ll Obsess Over

SKIMM Exclusive Offer

One Step Wonder

30% OFF with Code SKIMM30

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Front view of NuProtect Leave-In Primer bottle on white background

Front view of NuProtect Leave-In Primer bottle showcasing pump dispenser on white background

Front view of NuProtect Leave-In Primer bottle showcasing white pump and label on light gray background

Front view of NuProtect Leave-In Primer bottle showcasing pump top and product label on white background

I Love the Leave-In Primer!

The SKIMM x NuProtect™ Leave-In Primer

Name: The SKIMM x NuProtect™ Leave-In Primer
Brand: NULASTIN
SKU: 860013468958
Price: 32.0 USD
Availability: InStock

A silicone free, color safe leave-in conditioner and styling primer that instantly hydrates, detangles, tames frizz, enhances shine, reduces breakage and protects hair from heat up to 450°F/ 232°C for silkier, stronger, smoother hair.

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I Love the Leave-In Primer!

Biodesigned Elastin

[sh-Polypeptide-50]

A biomimetic, full length elastin protein containing 786 amino acids that helps supplement elastin where it is most needed to anchor the hair follicle to the hair root system– minimizing fall out and supporting scalp health

Biodesigned Keratin

Vegan, biomimetic keratin, Type I Cuticular Ha1 (KRT31), made up of 416 amino acids, reinforces tensile strength and forms a protective barrier that combats heat damage and breakage.

NuProtect™ Complex

[Ellagic Acid, Coconut Alkanes, Panthenol]

A next-generation protective blend including bioactive polyphenols and silicone alternatives that protect the hair cuticle from breakage, environmental stressors, and heat up to 450°/232°C

INGREDIENTS/INGRÉDIENTS: Aqua/Water/Eau, Glycerin, Pentylene Glycol, Squalane, Propanediol, Behentrimonium Methosulfate, Cetyl Alcohol, Stearyl Alcohol, Keratin, Panthenol, Coconut Alkanes, Coco-Caprylate/Caprate, Ellagic Acid, sh-Polypeptide-50, Sodium PCA, Butylene Glycol, Citric Acid, Cetyl Glyceryl Ether, Caprylhydroxamic Acid, Sodium Benzoate, Potassium Sorbate, Fragrance (Parfum), Tetramethyl Acetyloctahydronaphthalenes, Hexyl Cinnamal, Limonene, Hydroxycitronellal, Citrus Aurantium Peel Oil, Citrus Limon Peel Oil, Citrus Aurantium Bergamia Peel Oil, Geranyl Acetate, Lavandula Oil/Extract, Pinene, Linalyl Acetate, Linalool.

Triptych showing hair before, after combing, and after styling with headline Your Best Hair Day

Vegan

Sulfate Free

Silicone Free

Color Safe

Every Hair Type

Vegan

Sulfate Free

Silicone Free

Color Safe

Every Hair Type

A One Step Wonder, Endless Benefits

PROTECT + PRIME: Proven to shield hair from heat up to 450°F/232°C + reduce breakage by 68% for healthier strands.

FRIZZ FREE + SMOOTH: Tames 75% of frizz in one use + keeps hair sleek for 24 hours, even in 80% humidity.

DETANGLE + SOFTEN: Glides through knots, reduces breakage + leaves hair soft and ready for effortless styling.

HYDRATE + NOURISH: Lightweight humectants provide lasting moisture that nourishes hair without weighing it down.

Three-panel 'From Lackluster to Luxe' view: Before - wet, tangled; After combing - smoother; After styling - sleek, glossy

New at NULASTIN

Hair You’ll Obsess Over

SKIMM Exclusive Offer

One Step Wonder

30% OFF with Code SKIMM30

New at NULASTIN

Hair You’ll Obsess Over

SKIMM Exclusive Offer

One Step Wonder

30% OFF with Code SKIMM30

New at NULASTIN

Hair You’ll Obsess Over

SKIMM Exclusive Offer

One Step Wonder

30% OFF with Code SKIMM30

Meet the Science Behind Your Best Hair

Our NuProtect™ Leave-In Primer is powered by Biodesigned Elastin and Biodesigned Keratin—next generation, vegan proteins that mirror those naturally found in healthy hair. Together, they help anchor strands at the root, reinforce strength and build resilience against everyday stress.

The addition of our NuProtect™ Complex—a breakthrough blend of bioactive polyphenols, coconut alkanes, and panthenol—creates an invisible shield against heat, breakage and frizz.

Think of it as a high performance primer for your hair: sleek, strong and protected from root to tip.

Loved by Every Hair Type & Texture

NuProtect™ Leave-In Primer is vegan, color safe and free of silicones and sulfates, so your hair can thrive, no matter the type or texture.

✔ Type 1: Straight

✔ Type 2: Wavy

✔ Type 3: Curly

✔ Type 4: Coily

Six people with varied hair types smiling in a grid to illustrate every hair type

Smiling woman holding a hair dryer in one hand and a NULASTIN hair treatment bottle in the other against a gray background

Frequently Asked Questions

Got a question about NuProtect™ Leave-In Primer? The answer may be right here or you can check our full list of FAQs.

Most leave-ins stop at detangling. This one goes deeper. Powered by biodesigned elastin and keratin, it helps reinforce hair’s natural structure while NuProtect™ Complex shields from heat, humidity and environmental stressors.

Instead of heavy silicones that just coat the hair, this primer creates a lightweight, breathable shield that hydrates, detangles and protects against heat and environmental stress without weighing hair down or leaving residue, so strands feel smooth and natural.

Yes. In clinical testing, hair treated with the Leave-In Primer showed 73% less frizz after 24 hours in 80% relative humidity. That means the formula doesn’t just mask frizz — it actively defends against moisture in the air. How? The NuProtect™ Complex combines bioactive polyphenols and coconut alkanes to form a breathable barrier around each strand. This barrier helps limit water uptake, which is what normally causes hair fibers to swell and frizz. The result: smoother, more controlled styles that last, even when the weather doesn’t cooperate.

Yes! Since you heat style on non-wash days, you can absolutely use NuProtect™ Leave-In Primer on both damp and dry hair to keep it protected from heat and looking healthy.