Flexible chimney liners, also known as flue liners, are made with heat- and corrosion-resistant materials that are folded like an accordion. This design allows them to bend and adjust into place as they are being installed. They are commonly used to retrofit an existing stone or mason chimney. This allows the original structure to remain in place while protecting it from further exposure to heat and particulates from exhaust gases.

Flexible chimney liner kits include all the components for a standard installation to route exhaust gases out of a structure. They are used to retrofit existing chimneys and prevent further wear and tear from hot or corrosive exhaust gases.

Flex connectors attach to the ends of and join flexible chimney liners. This allows liners to run long distances by combining multiple shorter liners. They are made with the same heat- and corrosion-resistant materials as the liners.

Liner pull-downs connect to the ends of chimney liners and provide an anchoring point for a rope or string to pull the liner down through a chimney.