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Luran® S acrylonitrile styrene acrylate (ASA) polymers feature high surface quality and good impact strength including enhanced color fastness and deliver superior long-term performance when exposed to UV irradiation and heat. The polymers also have excellent chemical resistance. For these reasons, Luran® S is regarded as the material of choice for exterior applications. To strengthen its position as the benchmark styrenic polymer for weather resistance, Luran® S “SPF 30” was launched, offering state-of-the-art UV stabilization.