As much as I think this is a scam, I don't think that is a winning argument. He is working with prototypes; when it comes time to make the production ones. I'm sure things will change, not that I'll ever think he's going to get to that point.
As for the goo he's using as a gasket, I'm sure the production device will use a robust gasket that can take the temperature, pressure and whatever toxic brew (if there is any) inside. Diesel engine head gaskets take an incredible amount of abuse, I'm not worried about the replace ability of the Ecat materiel, if he's smart, he'll have it in cartridge form for them to make the swap easy and economical.
We should have a rating system for our posts that is at the bottom of the post. Something like:
SCAM.= S
REAL.= R
UNDECIDED.- Un
Or maybe at the top so people that don't want to, don't have to wade through posts that might give them the vapors.
The putty isn’t the main problem. It’s all the deposits and corrosion that will be a problem. That ecat has only operated for a few hours.