Shellac

What is Shellac?

Shellac originates from the resinous secretions of the female lac bug, Kerria lacca, primarily harvested in India and Thailand. This natural polymer, composed mainly of esters of aleuritic and shellolic acids, hardens into a glossy, protective coating. In cosmetics, it appears in nail polishes, hair sprays, mascaras, and lip products. Functionally, it forms a flexible, water-resistant film on skin, nails, or hair, enhancing durability and shine while binding particles for smoother texture. Its viscosity control properties stabilize formulations, preventing separation. Derived through a purification process involving solvent extraction and filtration, shellac provides a renewable, biodegradable alternative to synthetic resins, valued for its compatibility in both water- and alcohol-based systems.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Binder
Helps hold solid ingredients together to form cohesive tablets, compacts, or sticks, improving pressability, integrity, and wear of the finished product.
Film former
Creates a continuous film on skin or hair to improve wear, water resistance, transfer resistance, shine, or hold in sunscreens, makeup, and styling products.
Hair fixative
Provides style hold by forming a film on hair, helping maintain shape, reduce frizz, and improve durability in sprays, gels, and mousses.
Binding
Provides cohesion by helping ingredients stick together, improving the strength and integrity of pressed powders, tablets, or solid bars.
Emollient
Softens and smooths skin by filling in surface roughness and improving slip; can also help reduce moisture loss when paired with occlusives and film formers.
Hair fixing
Improves style retention by depositing film-forming polymers that hold hair in place while balancing stiffness, flexibility, and humidity resistance.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.

Benefits

Enhances product longevity by forming a protective film that resists water and transfer.

Improves hair styling hold, reducing frizz and maintaining shape throughout the day.

Softens skin texture and aids in creating smooth, cohesive formulas for better application.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of long-wear makeup seeking natural film-forming agents.
Those with known allergies to shellac or lac resin.
Individuals styling hair with sprays or gels for humidity resistance.
People sensitive to insect-derived ingredients.
People preferring insect-derived naturals in nail and lip products.
Individuals experiencing contact dermatitis from resinous materials.

Safety Notes

  • Rated low hazard by safety assessments from cosmetic review panels.
  • Generally non-comedogenic with minimal irritation in patch tests.

Frequently Asked Questions about Shellac

What is shellac derived from?

Shellac comes from the resin secreted by the lac bug, Kerria lacca, processed into a cosmetic-grade material.

Is shellac safe for sensitive skin?

It shows low irritation potential in safety reviews, but patch testing is advised for sensitivities.

What products commonly contain shellac?

Found in nail polishes, hair fixatives, mascaras, and some lip formulations for film-forming effects.