How Long Can Unopened Antifreeze Be Stored?

1 Answers
KatherineAnn
07/29/25 4:00pm
Unopened antifreeze can be stored for 2 to 3 years. Under sealed conditions, antifreeze does not deteriorate, as its structure consists of complex organic chemical chains. Composition of Antifreeze: The main components of antifreeze are: 50% purified water, 40% methanol, and 10% other substances. Types of Antifreeze: Antifreeze is generally categorized into three types: ethanol-water type, glycerol-water type, and ethylene glycol-water type. Can Different Antifreeze Brands Be Mixed? It is necessary to use the same brand of antifreeze. Different brands of antifreeze may have varying production formulas, and mixing them could lead to chemical reactions between multiple additives, rendering them ineffective. How to Choose Antifreeze: The basic indicators of antifreeze are its freezing point and boiling point. In the market, antifreeze is available with freezing points of -15℃, -25℃, -30℃, -40℃, etc. Generally, it is advisable to choose one that is at least 10℃ lower than the lowest temperature in your region.
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