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STR Holdings, Inc. is a holding company. The Company conducts its operations through its subsidiaries as a plastics and industrial materials research and development company. The Company designs, develops and manufactures encapsulants that protect the embedded semiconductor circuits of solar panels for sale to solar module manufacturers around the world. The Company has developed ethylene-vinyl acetate (EVA) based encapsulants for use in commercial solar module manufacturing. The Company has approximately 14 commercial encapsulant formulations, of which six are actively in use. The Company's encapsulant formulations offer a range of properties and processing attributes, including various curing times and temperatures that align with the requirements of its customers' individual lamination processes and module constructions. The Company's encapsulant formulations can be used in both crystalline silicon and thin-film solar modules.