CHEMSEAL consists of a PTFE coated fibreglass composite fabric to which has been laminated a latest technology corrosion liner. The composite fabric is the load bearing component. The 100% PTFE corrosion liner has a multi directional strength and durability, allowing it to function as a thick PTFE barrier for corrosive chemicals while maintaining a crack-free and flexible surface.
CHEMSEAL is generally used as the flexible membrane in fabric expansion joints. The fabric has been especially developed for wet and corrosive applications and exposures, including high acid areas where the dew point is reached within 24 hours, such as energy refuse and wet scrubber service.
CHEMSEAL fabric can be used as a flat belt or integrated with flanges or pipe hardware to create an expansion joint to absorb movements and misalignments in ductwork. Once measured and cut to suit the application or ductwork, the fabric can be heat seal joined to form a continuous belt.
It is recommended RADCOFLEX construct and assemble any new fabric expansion joints involving hardware.
Replacement fabric membranes can be fitted by the customer in most cases, subject to the complexity of the hardware configuration involved. A Heat Seal Iron, heat sealing film and instructions are available from RADCOFLEX if required.
0°C – 316°C (600°F) continuous
35 kPa (5 psi)
1.20 mm (0.047 ins)
Tensile strength (Warp x Fill)
– N/mm 210 x 210
– lbs/in 1200 x 1200