UV-571 is liquid benzotriazole UV absorber. It provides strong UV absorption in the 300-400 nm and minimal absorption in the visible light spectrum, especially excellent protection in the 300-400 nm range where most polymers are sensitive to UV degradations. UV-571 has good compatibility with a wide range of polymers. It has very low volatility even in high processing temperature. UV-571 is recommended for PVB, PMMA, PVDC, EVOH, EVA, PA, PET, PUR and PP etc.