That is for tight machined surfaces only .015 gap as I read. This is the same stuff we used on Cadillac Northstar crankcase's, It is the best I used for tight straight surfaces but wont work on most parts of a Mopar engine.
You are right to an extent...However, I've used it on timing chain covers, valve covers, oil pans, carburetor gaskets, and good fitting intakes, with no issues. Maybe it's all in the technique.
