An antifreeze is an additive which lowers the freezing point of a water-based liquid. An antifreeze mixture is used to achieve freezing-point depression for cold environments. Common antifreezes also increase the boiling … See more

Water was the original coolant for internal combustion engines. It is cheap, nontoxic, and has a high heat capacity. It however has only a 100 Kelvin liquid range, and it expands upon … See more

Ethylene glycol
Most antifreeze is made by mixing distilled water with additives and a base product, usually MEG (mono ethylene glycol) or MPG (mono propylene glycol). Ethylene glycol solutions first became available in 1926 and were … See more

Most commercial antifreeze formulations include corrosion inhibiting compounds, and a colored dye (commonly a fluorescent green, red, orange, yellow, or blue) to aid in identification. A 1:1 dilution with water is usually used, resulting in a freezing point of … See more

Automotive and internal combustion engine use
Most automotive engines are "water"-cooled to … See more

Once antifreeze has been mixed with water and put into use, it periodically needs to be maintained. If engine coolant leaks, boils, or if the cooling system needs to be drained and refilled, the antifreeze's freeze protection will need to be considered. In … See more

All automotive antifreeze formulations, including the newer organic acid (OAT antifreeze) formulations, are environmentally … See more