Year-round Cooling-system Fluid
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ANEW fluid for vehicle cooling systems has been put on the market in America by the Dow Chemical Co., Midland, Michigan, U.S.A. It is called Dowgard and is claimed to be the first fluid for this application which can safely be left in a cooling system for 12 months without detrimental effect to either the engine or radiator during both summer and winter months.
It is claimed, in fact, to be another step nearer the permanently sealed cooling system, which is considered in some quarters to be the ideal for liquid-cooled power units.
Dowgard is stated to protect against freezing, overheating, rust and corrosion, and consists of a blend of dicthylene glycol, ethylene glycol, balanced inhibitors and specially treated water which is said to be purer than commercial distilled water.
The fluid is stated to give superior rust and corrosion protection for all common cooling-system metals, including aluminium. Furthermore, it is compatible with rubber hoses, gaskets and so on.
It is simple to use. The cooling system, which has to be in first-class condition and thoroughly flushed before installation, is filled entirely with Dowgard, and the radiator filler cap is then fitted with a blue cover to prevent the system being interfered with during the course of the subsequent year.
A particular advantage of the use of Dowgard, compared with winter antifreeze mixtures, is that, because the system is sealed, the quality of the water content remains uniform. With a normal anti-freeze solution, this is liable to be topped up in different parts of the country where the quality of the water may vary appreciably, and so components that can hasten corrosion or form deposits are introduced into the cooling system.