Baytherm® 50HK04 is a polyol formulation that can be processed into a rigid polyurethane foam in combination with a suitable physical blowing agent (such as cyclopentane) and a suitable isocyanate (such as Desmodur® 44V20 L). The rigid polyurethane foam made from Baytherm® 50HK04 is typically used for thermal insulation of cavities.