Call 866-941-5112 now to speak to one of our chimney liner experts who will help you select the right liner.
Answer a few questions about your project and we'll show you the best liner for the job.
What's different about Flex King, Flex King Pro, and Flex King HD? Find out here and select the right liner that works for you.
DIY Lifetime Warranty | ![]() |
316Ti Alloy | ![]() |
2 Ply Construction | |
Ultra Strong | |
Super Easy Cleaning | |
Super Flexible | ![]() |
Easy Install | ![]() |
Smooth-Wall Technology |
DIY Lifetime Warranty | ![]() |
316Ti Alloy | ![]() |
2 Ply Construction | ![]() |
Ultra Strong | |
Super Easy Cleaning | ![]() |
Super Flexible | ![]() |
Easy Install | ![]() |
Smooth-Wall Technology | ![]() |
DIY Lifetime Warranty | ![]() |
304L or 316L Alloy | ![]() |
2 Ply Construction | * double the thickness of 1 ply |
Ultra Strong | ![]() |
Super Easy Cleaning | ![]() |
Super Flexible | ![]() |
Easy Install | ![]() |
Smooth-Wall Technology | ![]() |
DIY Lifetime Warranty | ![]() |
316Ti Alloy | ![]() |
Heavy Duty 24 Gauge Construction | * double the thickness of 1 ply |
Ultra Strong | ![]() |
Super Easy Cleaning | ![]() |
Super Flexible | ![]() |
Easy Install | ![]() |
Smooth-Wall Technology | ![]() |
Easier jobs. Flex King liner can be used for those on a budget on furnaces, boilers, and wood burning free standing stoves.
Tough jobs.
This is the liner with the best value. It can be used for relatively tough jobs. It can be used in furnances, boilers, and fireplace inserts, but is great for wood burning applications because of it's smooth wall construction which can cut down creosote build up by 20% and allows for super easy cleaning.
Jobs where you are installing this chimney liner in a tight clearance chimney or one that has some jagged edges or extreme offsets.
Flex King HD provides the highest quality of all our liners making it perfect for the toughest jobs. It can be used for all applications, but is great for wood stoves because of it's lack of creosote build up, easy cleaning, and extreme durabilty.
Recommended for all applications.
All appliances where the chimney has no bends or offsets. Requires a straight chimney from top to bottom. This is the most durable chimney liner on the market.
Chimneys with offsets.