One of the visitors that landed in one of our 5 gallon buckets articles questioned the airtightness of 5 gallon buckets in his or her google search. So what's the answer to that?
Some 5 gallon buckets have airtight lids and some others don't. There have been some occurrences where a 5 gallon pail with a lid on and full of contents falls over and guess what happens to the things stored inside? They are scattered everywhere.
So how do you know if a 5 gallon bucket is airtight or not? It's easy. You just have to check on the lid. Is it sealed positively and properly? You also need to see the thickness of the plastic that makes up the bucket and the lid. Thin buckets, even with an airtight lid, are prone to breakage when they fall. So consider to buy heavy duty 5 gallon buckets (90 mil) and forget about the thin cheap 70 mil buckets.
For the cover, we find that the gamma seal lids have the best positive seal and the easiest to use. Not only are they strong (made of BPA free HDPE), but they also fit different sizes of pails (3.5 gal, 5 gal, and 6 gallon buckets). So its versatility is unquestionable. It is also very, very easy to put on and off of a bucket. See the video below to see the demonstration.
So are your 5 gallon buckets airtight?