Non-Metallic Expansion Joints

Type "JLFC" Composite Buildup

Thorburn's JLFC composite gas seal membrane is designed to withstand the ductworks full temperature (up to 1100°C - 2000°F), even without the added protection of expansion joint cavity insulation.

Design Features

Working Temperature: 1100°C/2000°F
Excursion Temperature: 1260°C/2300°F
Chemical Resistance: Excellent
Other: Heat sealable, Wet/Dry service, Zero permeability, Zero porosity

Product Description

A: Optional Internal Vapor Barrier.
B: Inner Thermal Barrier.
C: Gas Seal Membrane.
D: Gas Side Thermal Barrier Flexible Refractory Textile.
E: Outer Thermal Barrier 13mm Thick Laminated Fiberglass.
F: 310 SS Wire Mesh.
G: Channel Backup Bars.


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Temperatures up to
1100°C - 2000°F


Thorburn Type "JLFC" Gas Seal Membrane