It`s a sheetmetal layer covered with rubber on both sides.
Edit: It`s a 0,2mm aluminum layer coated with 0,2mm fiber gasket matierial on both sides (0,6mm total), not rubber.
I want to make RD350 base gaskets out of this material.
The original 350 gasket is a simple paper gasket and it failed after maybe 5000km.
Yes, it was installed dry, no oil on the gasket.
![Image](https://abload.de/img/foto0540ippas.jpg)
![Image](https://abload.de/img/foto0543erqzd.jpg)