The average price of a new chimney liner ranges between $500 and $900, but the installation is relatively inexpensive. You can expect to pay an additional $75-$100 for materials like silicone sealant, pipe cement or fire-safe high temperature paint. The total investment will vary depending on your geographic location as well as local labor rates. If you choose to install it yourself then you might be able to save money that way too (depending on how skilled you are with tools). New liners usually come in standard lengths; however, there may be times when homeowners need custom sizes which could mean having them made by welding together several pieces at the job site. Individual sections typically range between $200 and $300 each.