The PTFE bands (PTFE also better known as Teflon) are placed over the welding wire and prevent the hot polymer from sticking to the welding jaws during the welding process.
Your Clesana toilet will inform you when you need to change the PTFE Bands. as the anti-stick effect of the Teflon begins to degrade after around 1500 Clesana welding cycles.
In order to maintain the quality of the welds, both PTFE bands must be replaced. The replacement can be carried out very easily by yourself.
