Polyurethane-1
What Polyurethane-1 is & what it does
Polyurethane-1 is a synthetic film-forming polymer built from urethane linkages. In cosmetic and sunscreen formulas it is used mainly as a film former that helps a product spread evenly and leave a flexible, even layer on the skin or nails. A notable property is that this film can improve water resistance and the staying power of a formula, which is useful in long-wear and sport-style products.
What does Polyurethane-1 do in skincare?
Polyurethane-1 is a synthetic film-forming polymer. In a formula it helps the product spread and then leave a thin, flexible film on the surface, which can improve evenness, wear, and water resistance. It is essentially a structuring and long-wear helper rather than an active.
Is Polyurethane-1 safe?
Polyurethane-1 is a film former used in cosmetics and is generally considered suitable for use at the levels found in finished products. Like any ingredient, it could cause a reaction in sensitive individuals, so patch testing is reasonable if you tend to react. We do not make medical claims about it.
Is Polyurethane-1 natural or synthetic?
Polyurethane-1 is synthetic. It is a lab-made polymer built from urethane linkages and is not derived directly from a plant or animal source. This synthetic nature is what gives it consistent film-forming behavior.
Sunscreens with Polyurethane-1
We rate 11 sunscreens that contain it, showing the top 10 by overall score:
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Honest Blithe UV Protector Honest Sunscreen SPF 50+ Pa++++
95/100
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Some By Mi Daily Waterfull Sun Serum (White) SPF 50+ PA++++
94/100
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Some By Mi Truecica Aqua Calming Sun Cream SPF50+ Pa++++
93/100
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Swanicoco All Day Care Peptine Biome Suncream
90/100
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Trinny London See The Light SPF 50+
89/100
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Wellage Real Hyaluronic Watery Sun Cream SPF50+/PA++++
82/100
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Peach C Peach Tone Up Sun Base SPF 50+ PA++++
75/100
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The Pure Lotus Jeju Botanical Sun Cream
72/100
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Charwee Charwee Dewy Broad Spectrum SPF 70 Pa++++ Sunscreen Stick
70/100
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SUNdance Sun Cream SPF 50
69/100