Anyone used "Bars Leaks"

[Bob Culver]

I dunno about current Bars Leaks but the product of old often used to soften the hoses of old. A layer of oil ifilm in an engine and radiator is reckoned to act as a signifiacnt heat barrier. Jaguar were also reckoned to use it in production. Although do not stop leaks there are relativley inexpensive products here which in my experience very very effectively counter corrosion. Used in compettion cars as specific heat not lowerd as with anti freeze.