Sekisui Kasei Yamakyu (株式会社積水化成品ヤマキュウ) is a manufacturer of molded products for vehicles and heavy equipment. It offers interior, exterior, headlining, and cover parts for trucks and buses, construction, agricultural, and industrial machinery, as well as medical equipment. In addition, the company provides glass wool molded products and vacuum, pultrusion, blow, and injection molded products.