Correct.
It's Permatex product in a 3 ounce tube. It will take a lot of abuse from heat, chemicals, and pressure.
I have experience with OS plastic backplates in the 15, 25, and 40. I'm a bit surprised that they applied this material to 65. On the smaller engines, they seemed to think that a plastic-to-metal seal didn't need a gasket.
The more I think about it, considering the dissimilar materials, a resilient liquid-applied gasket is probably the best you can do for plastic to aluminum.