Ultraflex is not just a flue liner
Ultraflex is meticulously Designed & Manufactured in the UK
 
At FSM, we've invested years in rigorous research, development, and meticulous product testing to create the perfect combination of quality and durability. We never compromise on excellence, and we're confident that Ultraflex will surpass your expectations.

Our Ultraflex liners boast stainless steel twin-lined grade 1, 0.12mm quality in 316 or 904, meeting the highest standards. Designed to endure high temperatures and resist corrosion, they're a testament to uncompromising quality and craftsmanship.

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