Can You Reuse Bernardin SNAP Lids? And When to Replace Bands

Walk into any Canadian Tire in late July and you’ll see the same scene: two people staring at the canning aisle trying to figure out which boxes they actually need to refill. Jars they have. Bands they have. Lids — do you reuse those?

The Bernardin answer is short and unambiguous, and so is ours: no. Here’s why, plus the band rules and a rough count for how much you actually need to buy.

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SNAP lids: single-use, every time

A Bernardin SNAP lid is a flat metal disc with a band of red sealing compound on the underside. During processing, two things happen:

1. The contents of the jar heat up, expand, and push air out under the lid.
2. As the jar cools, the contents contract, the air pressure inside drops, and atmospheric pressure outside pushes the lid down — pressing the red compound into the rim of the jar.

That compression is one-time work. The red compound deforms to fit your specific jar rim during the first seal. It is not designed to spring back and re-seal a second jar.

If you reuse a SNAP lid, one of three things happens, none of them good:

• The jar seems to seal but fails within weeks, often without you noticing until you open it and the contents are spoiled.
• The jar doesn’t seal at all — the button never goes down — and you discover this only after cooling.
• The jar seals well enough for water-bath time but fails the long shelf-storage test, leading to a contaminated jar months later.

Bernardin and Health Canada are both clear: SNAP lids are designed for single use. Don’t try to outsmart the design. A 12-pack of SNAP lids is around $5 at Canadian Tire — not the place to save money.

Bands: reusable until they’re not

The metal ring — the part that screws onto the jar — is reusable. You can use the same bands for years.

Retire a band when:

• It’s dented — even slightly. A bent band won’t apply even pressure across the lid and the seal can fail.
• It’s rusted enough that flecks come off when you wipe it with a damp cloth. Light surface rust is fine; flaking rust is not.
• It won’t screw on smoothly. If you have to force it, the threads are damaged and you’ll over-tighten without realizing it.
• It won’t sit flat across the lid. Hold the band up to light with a lid inside; if you can see daylight around the edge, the band is warped.
• It’s stuck to a lid and won’t come off without prying. Sometimes happens after a long-storage jar; the band is sacrificed when you open the jar.

A new band costs about $0.20. If you’re not sure, replace it.

One-batch trick: once a jar is fully cooled and sealed (the button is firmly down), you can remove the band, wipe the jar, and store the jar without the band. The vacuum holds the lid in place by itself. This frees the band for reuse on the next batch within the same season. It’s how serious canners get away with owning fewer bands than jars.

How many lids do I actually need?

Working backwards from the canonical Canadian tomato batch (one 4.5–5 kg / 10–11 lb case of paste tomatoes):

Jar size	Yield per case	Recommended lid buy
500 mL	~7 jars	One 12-pack
1 L	3–4 jars	One 12-pack (lasts 3 batches)

Buy in the size that matches your jars, plus 2–3 extras. There will always be one jar that doesn’t seal and needs to be refrigerated and eaten that week.

For a season-long stock (jam in June, pickles in July, salsa in August, tomatoes in September, apple sauce in October), most home canners go through 3–5 dozen regular-mouth 500 mL SNAP lids and 1–2 dozen 1 L lids. Buy more than you think; the unused ones don’t expire as long as they’re stored dry.

What about wide-mouth?

Same rules. Wide-mouth SNAP lids are sold separately from regular-mouth lids (different diameter). If you canned in wide-mouth jars last year, buy wide-mouth replacement lids this year. They are not interchangeable with regular-mouth.

Ball lids on Bernardin jars (and vice versa)

The Bernardin and Ball mason jar standards are nominally identical — regular-mouth and wide-mouth dimensions match across the two brands, and the lids interchange in most cases. Some Canadian canners use Ball lids with no issue.

That said:

• The Bernardin manufacturer warranty applies only when Bernardin lids are used on Bernardin jars.
• Older Ball lid stock from the US sometimes has slightly different sealing compound, especially the “wide” lids sold in the US for “wide-mouth pint” jars that don’t exist in Canada.
• For safety-critical canning (low-acid foods, pressure canning), match brand to brand.

If you’re at the Canadian Tire counter and they’re out of Bernardin SNAP lids, Ball regular-mouth or wide-mouth lids will almost certainly work fine. Just check the jar rim seats cleanly under the lid before processing.

Other gear that doesn’t survive forever

While we’re on the subject of “what to replace”:

• Jar rims. A chipped jar rim won’t seal. Run your finger around every rim before filling; if you feel a chip, retire that jar. Jam still seals on a slightly chipped rim sometimes; tomatoes and pickles rarely do.
• Jar lifter rubber pads. The rubber grips on a metal jar lifter degrade after years of hot-water dunks. If yours is slipping, replace the lifter — dropping a hot jar into a canner full of boiling water is a serious burn.
• Pressure canner gauge. Dial gauges need to be tested by your local extension service or a pressure-canner repair shop annually. An out-of-calibration gauge is the most common cause of pressure-canning failure for low-acid foods.

The short answer if you remember nothing else

• SNAP lids → buy new every year.
• Bands → reuse until visibly damaged.
• Jars → reuse forever if rims are intact.

Next steps

• See how to can tomatoes in Canada for what to do with those 12 SNAP lids.
• Read the water-bath canning pillar for the broader method context.
• Check our canning-times calculator when you’ve decided what you’re canning this weekend.