Super tight seal and doesn’t leak. I’ve left it out in the rain and all Dry inside

These lids do not create a proper seal, which is a huge problem for a product that is specifically designed and marketed to be air tight. To test these, I affixed 3 different ones to 3 of the food safe white buckets also bought from Harbor Freight. I watched several videos to make sure I was attaching them properly. Once they were installed, I tested the seals using various amounts of water inside the buckets. In every single case the buckets leaked BADLY. We're not talking water dripping out, we're talking water running out in a nearly continuous stream. If water can escape, then air certainly can as well. Again, I tested with various amounts of water ranging from a few cups to a full bucket -- the leaking occurred in all tests. I went searching to see if anyone else had encountered this issue, and it seems that plenty of people shared my experience, but unfortunately for many of them, they found out the hard way. Sadly, it seems that the Gamma2 screw down lids have decreased in quality significantly because those who bought them years ago report that they worked perfectly and were actually airtight. I suspect that Gamma2 has chosen to cut costs at the expense of their product. For those who don't actually need an airtight chamber, this is fine. For those who do need that, this isn't the proper product for you.