Weird thing in the MotoRad 206-180 Box

Real Gasket works just like stated. I tried everything, every way, to seal my thermostat housing, when I thought that I had it, I didn't. The Real Gasket worked. It did however fail when I installed a Flowkooler water pump, it blew out 2 times in a row. So it when into my stock 318 build, works as advertised. So I went with a Flashpower o-ringed housing for the Flowkooler water pump, no issues with it now.