Is Mason jar lid dishwasher safe?
Sometimes — the glass jar body is dishwasher safe, but the metal lid and its sealing compound are not.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Containers |
| Source | AI-reviewed · manufacturer guidance & material science |
| Last checked | 2026-07-28 |
Why
The Mason jar body is made of soda-lime glass, which is dishwasher safe under normal cycles, though repeated high heat can cause clouding (etching) from alkaline detergent. The metal lid is typically tin-coated steel; the dishwasher's heat and moisture can cause rust, especially at the rim and threads. The sealing compound (often plastisol) can degrade, leading to seal failure and print peeling. The manufacturer (e.g., Ball, Kerr) explicitly recommends hand washing lids to preserve the seal and prevent rust. The glass jar is top-rack safe, but lids and bands should never be machine washed.
How do you wash Mason jar lid?
- Separate the glass jar from the metal lid and band.
- Hand wash the lid and band in warm water with mild dish soap using a soft sponge or cloth.
- Rinse thoroughly to remove all soap residue.
- Dry the lid and band immediately with a lint-free towel to prevent rust.
- Wash the glass jar in the top rack of the dishwasher or by hand.
- Inspect the lid's sealing compound for any cracks or wear before reuse.
What happens if you put Mason jar lid in the dishwasher?
If you put a Mason jar lid in the dishwasher, after one wash you may notice slight discoloration or water spots on the metal. After repeated washes, the tin coating can wear off, leading to rust spots on the rim and threads. The sealing compound may become brittle or peel, compromising the airtight seal. The glass jar itself may become cloudy over time due to etching from dishwasher detergent. The damage is primarily functional: a rusted or degraded lid will not seal properly, leading to spoilage in canned goods. Cosmetic damage includes clouding and print fading.
Frequently asked questions
- Can I reuse Mason jar lids for canning?
- No, standard Mason jar lids are designed for single use in canning because the sealing compound forms a one-time seal. Reusing them risks seal failure and spoilage.
- What water temperature can Mason jar lids withstand?
- Mason jar lids are designed to withstand boiling water temperatures (212°F/100°C) during canning, but prolonged high heat in a dishwasher can degrade the sealing compound.
- How often should I replace Mason jar lids?
- For dry storage, lids can be reused until the seal is compromised. For canning, use new lids each time. Replace bands when they show rust or distortion.
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Popular checks
Last updated 2026-07-28. General guidance — always check your product’s care label. How we verify · Dishwasher care guides.