🧪 Efficiently Test Your Antifreeze with Custom Accessories 46664 Mini Antifreeze Tester Review

Air Bubbles Stick to Balloons. I tried tapping the tube but that doesn't help. Indicates that water does not freeze at -40F. And 100% antifreeze freezes at -10. I have no faith in this tester.

Dropper doesn't fit snugly in bulb. The antifreeze is gone. I attached it with a tie (see photo) so it can be used. But has it really come to this? I bought something like this from a parts store a long time ago and it has worked great for years.

Very easy to use. This is also a replacement for a similar one I have that is much older and I wasn't sure of the readings anymore. When storing, however, I keep it upside down in an old plastic cup. This keeps the flexible hose straight at the end. Otherwise, it will bend and have difficulty getting into the car's coolant reservoir.