Introducing our Generous and Beautiful Rock Wool Sandwich Board for Exterior Wall. Our factory is focused on producing high-quality building materials to meet the demands of the construction industry. This sandwich board features a durable exterior layer that is coated with a special resin to provide superior weather resistance. The core is made of high-density rock wool, which provides excellent thermal insulation for increased energy efficiency. The sandwich design also gives added structural strength to external walls. Our product is easy to install and has a long service life of up to 50 years, making it an ideal choice for a variety of residential or commercial applications. Contact us today to learn more about our rock wool sandwich board and how it can benefit your building project.