100cc 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 100cc Oxygen Absorbers you require are: • The volume of the sealed package • The volume occupied by the food product. The 100cc 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 100cc 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) 100cc Oxygen Absorbers can feel hard or crunchy.

100cc Oxygen Absorbers, once exposed to the atmosphere, begin to get to work immediately. That is why we suggest that unused 100cc 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 100cc 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 100cc Oxygen Absorbers are packaged with a quality check, called the ‘eye’. The indicating eye is packaged with the 100cc 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 100cc 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 100cc 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. 100cc Oxygen Absorbers in a well-sealed container will cause the lid to pop down. The shelf life of a 100cc Oxygen Absorber is up to 18 months.

How quickly 100cc Oxygen Absorbers remove oxygen from the atmosphere will depend on the conditions. In dryer climates, it may take up to a week for 100cc Oxygen Absorbers to fully activate. Warmer, humid climates however accelerate the process and may take only 48 hours for the same result.

100cc 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.

A general guideline is 5g of silica gel per 1L of air volume. Multiple Silica Gel 25g sachets may be required depending on the size of the space.
Refer to our Silica Gel Calculator.

Silica Gel 50g is a non-toxic desiccant used to protect products from humidity and moisture damage. It is made from porous, granular amorphous silicon dioxide, which adsorbs moisture to keep environments dry.

Silica Gel 50g adsorbs (not absorbs) moisture onto its surface, effectively reducing humidity levels inside sealed packaging or containers.

Yes. Silica Gel 50g is generally non-toxic and safe to handle. It is widely used in food packaging, electronics, pharmaceuticals, and textiles.