Polyquaternium-7 Good Film-Forming Agent No known benefits Polyquaternium-7 at a glance Works as a film-forming + viscosity increasing agent in skin care Detangler and conditioning ingredient in hair care Ruled safe as used in cosmetics Usage levels range from 0.009-5% Polyquaternium-7 description Polyquaternium-7 is a synthetic polymer used in skin care products as a film-forming agent and to help increase the viscosity of a formula. In hair care, it is a detangler and conditioning ingredient. In its liquid form, it is a clear to pale yellow color. The independent Cosmetic Ingredient Review has ruled polyquaterium-7 safe as used in cosmetics. Usage levels for polyquaternium-7 range from 0.009-5%. Related ingredients: Polyquaterniums Polyquaternium 39 Polymer