FITFIRE is a thermo-hardening sheath with a heart of fiberglass and water-based phenolic resins.

The jacket is the first of a range of four products, coming from applied research and thanks to modern and most advanced technology in the world. This is the most innovative system of renovation for all gas ducts (maximum exhaust temperature: 300°C), which combines the most intelligent materials with the most advanced research. The result is achieved through the composite of hi-tech research. In the BECA Engineering srl laboratories, near Milan, our technicians put their passions and intelligence to study and develop systems that adapt to all situations, with one goal: “Do not destroy, and thus reuse the currently existing duct”. FITFIRE meets and marries all possible shapes of your gas duct, just like a tailor-made suit, and thanks to its high-tech textile materials, it will form a highly-resistant layer which will work as a “second skin” on top, making the duct much stronger than before


Insulating and waterproof material: improves exhaust fume speeds; Self-standing material: no need to anchor it; Clean work: no excessive dust; Higher thickness compared to conventional materials; Higher heat resistance: tested up to 450°C; Residual internal roughness: <0.5 mm; Thermal resistance: as per UNI 9731 D; Thermal conductivity: 0,4 W/MK; Smoke speed: > 20-30%, compared to that of steel and stainless steel; Tensile strength: 400 N/mm2; Resistance to corrosion: H2SO4 conc, HNO3 conc, Hcl conc.


  • Installation time: paltry compared to other renovation systems (less than a day to the duct of a building)
  • Less destructive: no masonry required.
  • Simpler: it just takes connecting the devices to the duct.
  • Cleanliness: no rubble, therefore no formation of dust.
  • Waterproof insulating material: improves exhaust fume speed
  • Self-standing material: no need to anchor it.
  • No joints:the one, continuous tube is cut to measure during assembly.
  • Higher thickness compared to conventional materials.
  • Heat resistance: Continuous use at 300°C
  • Total resistance to condensation and corrosion

    The thermosetting lining FitFire plus is now even easier to install, with higher yield and greater economic pressure to seal the moisture up to 5000 Pa.


    The sheath FitFire with its features is ideal for the restoration of the flues, being resistant to high temperatures can be used for the discharge of centralised boilers, or the restoration of collective flues or device type “B” open chamber and natural draft.

    The large thermal resistance combined with good thermal insulation make the sheath Thermoset FitFire an ideal product for the discharge of the combustion gases of heating appliances and hot water production, ensuring also a speed of the fumes superior to other commercially available materials.

    The certification of resistance to acid condensate drains to make it suitable for high humidity condensing units newly developed.


    The sheath FitFire find easy application in the field of air conditioning. The very low residual internal roughness (less than 0.5 mm) allows the inner lining of existing pipelines without any limitation to the operation.

    FitFire is tested and certified.


    The FITFIRE sheath is slipped into the duct to be renovated. It will be inflated first with air then with steam. This will allow it to expand and fit perfectly the duct’s perimeter like a second skin. Any bumps or cracks along the duct will be sealed since FITFIRE completely adapts and adheres to the existing walls, making the duct totally waterproof and protected from condense.

    Once the sheath is inserted in the chimney the thermosetting resin is “fixed” with a jet of steam at high pressure and temperature, hardening the sheath so that in a few minutes the duct is restored without the need for building works, reducing the time and cost of implementation.

    No need to break walls and floors to remove old pipes.

    FITFIRE Certification

    Issued by Institute of Research & Tests M.MASINI S.r.l.

  • Designation according to UNI 1443 – UNI 1856 et 1859: Camino EN 1443 standards
  • Gas Leakage Test (EN 1856-2:2003 pt.6.3) R.p. n.768-2006
  • Resistance to fire soot test (EN 1856-2:2003 pt.6.2.1) R.p. n.768-2006.
  • Resistance to condensation test (EN 1856-2:2003 pt.6.4.5) R.p. n.769-2006
  • Thermal resistance test (EN 1856-2:2003 pt.6.4.3) R.p. n.770-2006