Thanks John.
Back in the day, we would buy our wetting agent from a firm in Colorado to use in stem-dying flowers. It finally dawned on me, after close examination, that this stuff we were paying a premium for was nothing more than powdered detergent that we use in washing clothes, such as Tide.
It would seem strange to me to put any soap in the radiator, if that is what this is. I would imagine it would be foaming like a mad-dog.

~Jim