MI Flex is a double skinned flexible flue liner designed for relining within a masonry chimney. Suitable for use with burning gas, oil, coal, coke, cured dry logs, cured dry peat and approved smokeless fuels.

Manufactured using 904L grade stainless steel, which is rolled, seamed and manipulated in such a way that it forms both the outer corrugated durable case and an extremely smooth inner core. This liner has a high resistance to damage, is virtually impossible to unwind and can withstand prolonged high temperatures without distortion. These flexible liners are specifically designed for use with solid fuel. Double skin liners are not to be confused with single skin flexible liners which are designed solely for use with gas fires which must not be used with solid fuel appliances under any circumstances.

It is recommended that chimneys serving solid fuel appliances be swept and maintained as frequently as necessary but at least once a year.

This product carries a Lifetime manufacturer’s warranty when installed with Screw-FIX accessories.