Does Antifreeze Expire. Where freezing does occur the antifreeze proteins retard the growth of ice crystals. The coolant should not expire any time soon.
How do I prevent antifreeze poisoning? Antifreeze does not have an expiration date nor does it go bad. An antifreeze mixture is used to achieve freezing-point depression for cold environments.
Antifreeze — coolant that has not been mixed with water — tends to last even longer than pre-mixed engine coolant You can buy antifreeze testers to measure the level of coolant freeze protection.
It just freezes at a much lower temperature than ordinary water.
Coolant made up of antifreeze and water out. Adding anti-freeze is a simple maintenance project that most drivers are able to complete with ease. As the name suggests, antifreeze prevents the coolant inside your engine from freezing under normal.