Chimney Liner Pro is a selected online retailer for National Chimney Supply, The original "Flex Liner" manufacturer – we are the only company that sells industrial-quality chimney products to homeowners.

For the past 24 years M-FLEX chimney liners and kits have been the premier choice for professional chimney sweeps across the country. We manufacture and distribute chimney products in Vermont, Maryland and Indiana, so we are quickly able to fulfill and ship orders to customers east of the Mississippi. M-FLEX liners are made from the highest grade mill certified stainless steel alloy and backed by a Lifetime Transferable Warranty. All our liners are designed to easily fit and work together to reline your existing chimney. Our products are UL-Listed and tested which is ideal for appliances that burn wood, coal, oil, corn or gas. We also stock Chimney Liner Insulation, Aluminum Liners, Stainless Steel Chimney Caps, Chase Covers, Multi Flue Caps and Chimney Repair Products like Crown Coat and Flash Seal.

Remember when you shop with a true American company like Chimney Liner Pro a portion of your purchase goes to help Wounded Warriors.

Shipping included. Made in USA.