Oxy-Sorb 3x 10-Packs (30 total) Oxygen Absorber, 2000cc

These are great oxygen absorbers. I'm really glad they ship in three separate sealed bags too, since it makes it easier to use a few at a time. They come with an oxygen indicator in each bag too, so you know if they're still sealed or not. Plus, you can seal the bags back closed with an iron if you don't use all 10 at once. I used these for grain storage in food safe 5 gallon buckets. They worked so well that they puckered in the sides of the buckets after I had sealed them in! Almost a year later, I've opened up a few of the buckets an there's no sign of any degradation/rot/pests on any of the grain.

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I received the absorbers in fine fashion. I put them in 5 gallon cans of grain, using 5 Gallon (18"x28") Ziplock Zip Seal Mylar Bags, I pressed as much air out as I could, added one 2.000cc absorber, to little effect after waiting 5 hours, so I opened the mylar bags and added up to three in each 5 gallon can. Still no vacuum effect. It could be the bags, it could be me, or it could be these absorbers. Maybe I am suppose to use more than I did, but over all this has been frustrating and not effective. I don't know where to go now to solve my long term storage problem. The unused absorbers did create a vacuum effect in the quart jar I stored them in, so I know they worked to a degree, just not to the degree I needed in this case. Darn. As an addendum, I have since gotten new absorbers and sealed the mylar bags with an iron set on Cotton. I got a great vacuum seal and the bag tightened up wonderfully against the item stored within a few hours. All was well. The problem was trusting the ziplock seal on the mylar bag. I hope you will learn from my mistake.

These O2 absorbers work well (as evidenced by the partial vacuum they've created in the spaces I've placed them). The only thing I'd change is I'd have them sealed separately in smaller quantities. They are packaged 10 to a pack, so if you aren't prepared to use all 10 in a hurry, you have to either 1) reseal them quickly (I recommend vacuum seal) or 2) throw them away. Alternatively, you can store them in a zip lock, but they will, at least partially react to the O2 in the zip lock (you can't get as much out as with a vacuum seal). Aside from that though, they appear to be a good value and if I need more I will buy these again. Recommend.

I've tried a couple different brands from different sources. I've had good success with these absorbers. They have also stored better than some of my other absorbers though I wouldn't recommend purchasing them any sooner than needed. The fresher the better. Early in my packaging days I was having a 10-30% failure rate of bag sealing. I have a good sealer and purchase heavy mylar bags. I though my failure rate could be from low quality absorbers or pin holes in the bags. I now believe the bag seal is the essential step. For heavy bags the sealer needs to be hot, on the hi setting. Per my IR temperature gun my sealer is over 300F when I start sealing. I hold the sealer on for about 30 seconds to make sure the mylar bag becomes very hot. I try to make sure the two sides of the mylar bag are flat too before closing the sealer. I also apply two parallel seals in case one leaks. I seal the bag most of the way across the top leaving a small gap just large enough to put the absorber in the bag. Once I have ten bags ready I open the package of absorbers, fill the 10 bags, and seal the final small gap. With this method my absorbers aren't exposed to air for very long before they are closed in the bag.