Is this nail lacquer safe for people with sensitive or brittle nails?

The formula contains fast-evaporating solvents and plasticizers that can dry the nail plate, so users with sensitivity or brittleness should apply a nourishing base coat and monitor for irritation.

What role does nitrocellulose play in the Think Big 5-day nail polish?

Nitrocellulose acts as the primary film former, creating a flexible, adherent coating that locks pigment in place and contributes to the lacquer's high-sheen and long-lasting performance.

How often should the Think Big 5-day lacquer be reapplied, and does it contain any ingredients that are considered controversial in nail cosmetics?

The lacquer is intended to stay intact for up to five days before a top-coat refresh or removal is needed; it includes common solvents such as ethyl acetate and butyl acetate and plasticizers, which some consumers avoid due to potential irritation, but it does not contain the more heavily regulated phthalates.

Sephora • 5 ml

Vernis à ongles laque brillance 5 jours L18 Think Big

Makeup

Product Insights

Sephora's Think Big 5-day high-shine nail lacquer is a 5 ml glass-bottled formulation designed for durable, glossy colour on the fingernails. The polish combines common nail-lacquer components such as fast-evaporating solvents, a nitrocellulose film former, plasticizers and pigments to provide up to five days of wear and a high-sheen finish. However, the solvent blend and plasticizers can cause nail drying or irritation for sensitive users, and the product is not marketed as vegan or cruelty-free.

Comparative Analysis

While most standard nail polishes deliver 2-3 days of wear, this Sephora Think Big lacquer promises five days of high-gloss durability, positioning it in the premium long-wear segment of the nail-cosmetics market.

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Frequently Asked Questions

Everything you need to know about Vernis à ongles laque brillance 5 jours L18 Think Big.

Sephora

5 ml