Vacuum pouches are one of the best freezer packs a food business can use. Freezer burn is the surface of the food drying out where air touches it, and a tight vacuum pack leaves no air to touch it. Pack fresh, freeze fast, thaw in the fridge, and a joint that's been frozen for months cooks like one frozen last week.
Why does vacuum packing stop freezer burn?
In a freezer, ice on the surface of the food slowly turns straight to vapour and settles as frost inside the bag. That leaves dry, grey, leathery patches on the food. It happens wherever there's an air gap between the food and the packaging. A loose freezer bag has plenty. A vacuum pouch pulled tight to the product has none, so there's nowhere for the moisture to go.
The pouch also stops oxidation, which is what turns the fat in frozen fish and pork rancid over time. The polyamide layer in our PA/PE film is the oxygen barrier. The film guide explains how the layers work.
Should I vacuum pack before or after freezing?
Before. Always. Frozen product has hard, sharp edges, and under vacuum the film is pressed onto them hard enough to cut. Pack fresh product straight from the chiller, then freeze it. If you need to portion something that's already frozen, let it soften in the fridge first.
Two habits help:
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Pack flat. Mince, diced meat and sauces laid out in a flat slab freeze faster and stack better. A 500g slab in a 200×250mm pouch is about 2cm thick.
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Don't stack warm packs. Spread them out on the freezer shelf until they're frozen solid, then stack. Packs frozen in a block take far longer to come down through the temperature range where quality suffers.
How long does vacuum-packed food keep frozen?
At -18°C or below. These are the ranges the trade works to for a sound pack. Frozen life is about eating quality, not safety, and your own product and HACCP plan set the date you put on the label.
| Product |
Frozen, vacuum packed |
| Beef |
Around 12 months |
| Lamb |
9 to 12 months |
| Poultry, raw |
9 to 12 months |
| Pork, fresh |
6 to 9 months |
| Mince and sausages |
3 to 4 months |
| Oily fish, such as salmon |
Around 6 months |
| Bacon and cured meat |
3 to 6 months |
The shelf life guide gives the chilled figures alongside these.
What's the safe way to thaw vacuum-packed food?
In the fridge, not on the bench. Meat can stay in the pouch while it thaws. Fish is different. Fish can carry non-proteolytic Clostridium botulinum, which grows without oxygen at fridge temperatures. A sealed vacuum pack thawing slowly in the fridge gives it exactly that. So cut the pack open, or take the fish out of the pouch, before it goes in the fridge to thaw. If you sell frozen vacuum-packed fish, put that instruction on the label. The fish guide covers packing it.
Once thawed, treat it as chilled product with a short life. Don't refreeze raw product that's been thawed unless it's been cooked first.
Which pouch is best for the freezer?
Our standard 65 micron clear pouches handle freezing well for boneless product. Use the size that fits the product snugly, because a loose flap of film is where frost collects. For bone-in product going into long frozen storage, cover the bone points or step up to the 130 micron pouch, since film gets less forgiving at -18°C.
If you keep frozen and fresh stock in the same walk-in, blue pouches make frozen packs obvious at a glance. Some kitchens use them for anything that's been frozen, so nobody refreezes it by mistake. The blue pouch guide explains the system.
Label every pack
Write the product, the date packed and the date frozen on every pack. A vacuum-packed portion of beef and one of venison look much the same under a layer of frost, and a freezer full of unlabelled packs is a freezer full of guesswork.
Setting up a freezer system? Ask for a free sample pack with clear and blue pouches in your main sizes.
