These are coated steel head gaskets that crush, it is very obvious when you compare a used one to a new one that they crush when they are torqued. There is also a sealant coating that adheres to the mating surfaces and visibly comes off the gasket .
I have been through 5 head gaskets on my 11:1 102mm 660 in about a 5 year troubleshooting adventure. I would visit the dunes once a year and the head would lift and blow while the engine was hot and 2 of the 3 times at Little Sahara I was at the drag strip. I replaced bolts, lock tighted them, upped my octane, decked both surfaces and tried 2 different gasket brands before getting it to seal. The gasket would hold for all the slower trail riding around home.
You MIGHT be able to copper coat it and get by, I did once in a pinch, it blew later, but it may not be worth the hassle later.
01' Raptor 720, Stage 2, FCR'd
97' 250 Vitos Blaster
06' Rhino 450
94' Banshee T-5's, Vforce, ported, Cool Head, 2-1
06' Wolverine 450 - Stock!
06' LTZ 440
94' Vmax4 750, 96' 600 MountainMax, 07' Nytro(b00sTed)
06' Vmax 1200