PVC-U, or unplasticized polyvinyl chloride, is a type of plastic commonly used in construction and plumbing. Unlike regular PVC, it does not contain plasticizers, making it more rigid and durable. This material is resistant to chemicals, corrosion, and UV light, which makes it suitable for various applications, including pipes, windows, and doors. Due to its strength and low maintenance requirements, PVC-U is a popular choice for both residential and commercial projects. It is lightweight, easy to install, and can be recycled, contributing to its appeal in sustainable building practices.