Novaphit SSTC TA-L is the first universally applicable graphite flat seal which meets all requirements of the chemical industry and plant engineering in all respects. Of course, this includes all the criteria in Germany's Technical Instructions on Air Quality Control, TA Luft. The flat gasket is made of expanded graphite, a material composition free of adhesives and bonding agents (min. 98% purity) and an acid-resistant plug-in metal insert made of chromium-nickel-steel.