No. Oxygen Absorbers remove oxygen, but they do not remove nitrogen or other gases. This means: • Packages may not shrink like vacuum-sealed bags but are still protected. • The contents inside are preserved by the absence of oxygen, preventing spoilage. • If properly sealed, the packaging should feel slightly compressed after some time.

The expiry date indicates when Oxygen Absorbers should be used for optimal results, typically within 18 months of production. They remain effective until opened, at which point oxidation begins. Proper storage—sealed, away from heat and sunlight—ensures longevity. If partially used, reseal in a vacuum bag and use within six months. Click here to view a statement from our supplier.

For premium Oxygen Absorbers that ensure long-term food preservation, Protection Experts Australia offers: • Different sizes for various food storage needs. • High-quality, non-toxic Oxygen Absorbers for safe use. • Bulk purchasing options for home storage and businesses.
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📞 Need expert advice on Oxygen Absorbers? Contact Protection Experts Australia for the best solutions in food storage and moisture protection.

Oxygen Absorbers once exposed to oxygen will immediately start to oxidise, capturing the surrounding oxygen. This activation period can last between 4 hours to 24 hours. Once the absorber has completely oxidised, the absorber is no longer working. This might sound like a problem, however bear in mind that the role of the absorber is to remove oxygen within your sealed package. Should that package remain sealed, then the conditions within the package will remain oxygen-free. Re-open a package and you will be exposing the contents to oxygen. In this case, the original absorbers should be discarded and replaced with new oxygen absorbers. There are a couple of variables to consider: • How permeable is your packaging? A high barrier packaging solution such as mylar will ensure that oxygen does not pass through to package contents. The lower the permeability of the packaging material (e.g. paper bag), the more often oxygen absorbers will need to be replaced. • Oxygen absorbers once fully loaded or ‘spoiled’ no longer have the capacity to absorb additional oxygen. It’s important to therefore make sure that you ‘round up’ when calculating your oxygen absorber needs. Underestimating your oxygen absorber needs will leave a portion of oxygen within your package causing contents to deteriorate faster over time.

30cc Oxygen Absorbers are used in sealed packaging to: • Extend shelf life of dried foods, powders, and snacks. • Prevent mold and bacterial growth by removing oxygen. • Preserve beef jerky, dried meats, and protein powders. • Protect grains, dehydrated fruits, and flour from spoilage. • Stop oxidation in pharmaceuticals and electronics. They work best in airtight containers like Mylar bags, vacuum-sealed bags, and food storage jars.

The factors to consider when calculating how many 30cc Oxygen Absorbers you require are: • The volume of the sealed package • The volume occupied by the food product. The 30cc Oxygen Absorber calculation isolates the volume of the food packaging void – sealed package volume less food weight – multiplied by 20%. The factor of 20% reflects that our atmosphere comprises 20% oxygen and 80% nitrogen. For those who like the numbers, the formula is:
(Sealed package volume – food volume) × 20%
. And for those who prefer a shortcut (who doesn’t),
check out our online Oxygen Absorber Calculator to find out how many you will need at the click of a button.

A new 30cc Oxygen Absorber will have a loose powdered feel when pinched. It should feel free of clumps and may feel warm (a by-product of the absorber working in a moist environment). Spent (or expired) 30cc Oxygen Absorbers can feel hard or crunchy.

30cc Oxygen Absorbers, once exposed to the atmosphere, begin to get to work immediately. That is why we suggest that unused 30cc Oxygen Absorbers should be resealed within 30 minutes to ensure the integrity of the product is maintained.

We understand that Protection Experts Australia customers should feel confident they are receiving the best quality products. The unopened 30cc Oxygen Absorber bag might feel hard, but that is due to the vacuum seal as they are all clumped together. Once the bag is opened, the sachets will separate and should feel like the container sand/granules. All our 30cc Oxygen Absorbers are packaged with a quality check, called the ‘eye’. The indicating eye is packaged with the 30cc Oxygen Absorbers and will appear pink, showing that the package is sealed and oxygen-free. Should the eye appear purple, this indicates that oxygen has penetrated the packaging through possibly a puncture or poor seal and the 30cc Oxygen Absorbers have been compromised. In this instance, we ask that you contact our office immediately so that the problem can be rectified.
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Store 30cc Oxygen Absorbers at room temperature (5°C to 30°C), away from direct sunlight. They should be stored in their sealed package or a glass jar with a gasketed lid. Select the smallest glass jar possible to minimise the oxygen the absorbers will remove from the jar. 30cc Oxygen Absorbers in a well-sealed container will cause the lid to pop down. The shelf life of a 30cc Oxygen Absorber is up to 18 months.

How quickly 30cc Oxygen Absorbers remove oxygen from the atmosphere will depend on the conditions. In dryer climates, it may take up to a week for 30cc Oxygen Absorbers to fully activate. Warmer, humid climates however accelerate the process and may take only 48 hours for the same result.

30cc Oxygen Absorbers trap oxygen. Given that air comprises 20% oxygen and 80% nitrogen, the absorber will only be removing the 20% of the atmosphere that is oxygen. The volume of nitrogen remaining will mean your bag will not deflate to the extent of the bag becoming hard or rigid.