news IEC 61730 UV Aging Inhibitor of Foaming Retarder 1027 in Photovoltaic Panel Frame Sealant The application of foaming retardant 1027 in photovoltaic panel frame sealant and research on ultrav... 03/19129IEC 61730 UV Aging Inhibitor of Foaming Retarder 1027 in Photovoltaic Panel Frame Sealant