Polyquaternium-57

What is Polyquaternium-57?

Polyquaternium-57 is a synthetic copolymer featuring quaternary ammonium groups, designed for use in hair styling and conditioning products like gels, sprays, mousses, and leave-in treatments. Its positively charged structure enables strong adhesion to hair's negatively charged surface, allowing it to deposit evenly and form a sheer, elastic film. This film helps lock in moisture, shield against environmental humidity, and maintain hairstyle integrity over time. As a conditioning agent, it coats the hair shaft to minimize surface roughness, cut down on tangling, and enhance overall texture without weighing hair down. Typically incorporated at low levels in rinse-off or leave-on formulas, it supports product performance in categories focused on frizz control, smoothness, and durability.

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

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

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 conditioning
Improves softness, shine, and manageability by reducing friction and static; commonly achieved with cationic agents, silicones, oils, or conditioning polymers.

Benefits

Forms a flexible film on hair for humidity resistance and style longevity.

Reduces friction between strands for smoother combing and less breakage.

Adds shine and softness while combating static electricity.

Who It's For

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

Who May Benefit Who Should Avoid
People with frizzy or unruly hair seeking better control.
Users with rare sensitivity to quaternary polymers.
Individuals styling hair for extended wear without reapplication.
People avoiding synthetic conditioning agents.
Those with normal to dry hair wanting improved texture and luster.
Individuals preferring silicone-free or minimalist formulas.

Safety Notes

  • Considered low hazard in cosmetic concentrations by safety assessments.
  • Non-comedogenic and suitable for typical use levels in hair products.

Frequently Asked Questions about Polyquaternium-57

What does Polyquaternium-57 do in hair products?

It conditions by smoothing cuticles and forms a film for hold, shine, and frizz reduction.

Is Polyquaternium-57 safe for daily use?

Safety reviews indicate it's suitable at cosmetic levels with low hazard ratings.

Does it work on all hair types?

Effective across types, especially for adding manageability to frizzy or styled hair.