New EKO Slicone Door Gasket
These have become very popular and well liked by EKO users. The BioMass stove actually is manufactured with the Silicone Door Gasket.
Silicone sleeve over solid fiberglass rope. It is very substantial.
You might have a hard time working the new gasket into the groove....it's that tight.
In order to get the door closed and sealed, you might need to back the hinges out three full turns. The first few times you might even need to put your shoulder into the door to get the handle to catch. Once it is seated and has had some heat it will get easier.