Ambient is right. With HyperLube your system will foam like a sonuvab*tch if there is ANY air in it. If he shows no foam (and having air in your radiator will facilitate massive foaming due to its design), there is no (or at the most insignificant amounts) air in the system.
Bad@ss rig, man.
BTW, I think that Water Wetter does a slightly better job than the HyperLube, but I had the same issue trying to find some. I'm using if for the same reason you are: no Water Wetter in sight.
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