Closed, sealed, airtight — three different things
People use these words as if they mean the same thing, and the difference is worth knowing before you decide anything.
Nearly every urn we make arrives closed, not sealed. That's deliberate: sealing is a one-way decision, and most families want the option to open the urn again — to move a small portion into a keepsake or jewelry, or simply to hold it once more.
How pet urn lids close
The closure depends on the shape and material. Most fall into one of these:
| Closure | Found on | Opens again? |
|---|---|---|
| Lift-off lid | Ceramic urns with a wood or ceramic lid | Yes — lifts straight off |
| Threaded base | Many metal and some ceramic urns | Yes — unscrews from underneath |
| Base plate with screws | Metal and heavier urns | Yes — with a small screwdriver |
| Wooden panel | Wooden photo-box urns | Yes — via a removable panel |
| Friction-fit lid | Small keepsakes | Yes — a firm push and pull |
If you're not sure how a particular urn opens, the product page lists it, and a small card usually comes in the box. Our guide on how to transfer ashes into an urn walks through opening and closing one step by step.
Do you actually need to seal it?
For most people, no. Here's the honest split:
Add a seal if
- The urn will be buried in the ground
- It will be mailed or flown somewhere
- Your home has curious pets or small children
- It will be moved and handled often
Leave it closed if
- It stays on a shelf or mantel at home
- You might split the ashes later
- You may move a portion into jewelry
- You're simply not sure — you can always seal it later
How to seal a pet urn safely
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1Wipe the rim clean and dry. Adhesive only holds on a clean, dust-free surface. A dry cloth is enough.
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2Choose the right adhesive. A clear, food-safe silicone works well on ceramic and metal. Avoid super glue — it's brittle, can leave a white haze on a glossy glaze, and bonds instantly with no room to adjust.
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3Apply a thin bead around the rim, not a thick one. A little goes a long way, and less squeezes out when you press down.
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4Seat the lid and wipe away any excess right away with a damp cloth, before it starts to set.
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5Let it cure fully before moving the urn — usually 24 hours for silicone, but follow the product's own instructions. Don't rush this part.
A reversible alternative to gluing
If your only worry is a lid lifting — a bump, a cat, a curious toddler — you don't have to glue anything. A ring of museum putty (also sold as earthquake putty) under the lid holds it firmly in place and still peels away cleanly months later. It's the middle ground: secure now, reversible if your mind changes.
Sealed isn't the same as airtight
Gluing a lid down doesn't make an urn airtight, and it doesn't need to be. Glazed ceramic is non-porous and moisture-resistant, the ashes are protected inside their bag, and on a shelf at home there's simply nothing for moisture to do. If you're weighing up materials and how well each keeps moisture out, is ceramic safe for pet ashes covers it in full.
Urns, and how each one closes
Every urn here closes securely and opens again if you need it to. Each is made to order from your pet's photo, with their name and dates.
Browse everything in the pet cremation urn collection.
Frequently asked questions
Are pet urns sealed when they arrive?
Usually no. Most arrive closed — the lid seated but not glued — so you can open the urn again if you need to. A permanent seal is something you add yourself, not something the urn comes with.
Should I seal my pet's urn?
Only if it will be buried, mailed, flown, or handled often, or if your home has curious pets or small children. For an urn that stays on a shelf, a closed lid is enough.
How do you seal a ceramic pet urn?
Wipe the rim clean and dry, run a thin bead of clear food-safe silicone around it, seat the lid, wipe away any excess, and let it cure fully before moving. Avoid super glue, which is brittle and can leave a white haze on a glossy glaze.
Can I open a sealed urn later?
A glued seal is meant to be permanent and is hard to undo without risking damage. If you think you might want to open it again, leave it closed, or use removable putty instead of adhesive.
Are pet urns airtight or waterproof?
Most decorative urns are neither, and don't need to be. Glazed ceramic is non-porous and the ashes are protected inside a sealed bag, so a home shelf poses no moisture risk.
Is the bag of ashes inside already sealed?
Yes. Crematories return ashes in a sealed bag, which goes into the urn as it is. That's why the urn itself usually doesn't need sealing for the ashes to stay protected.
An urn that closes now, and opens if you ever need it to
Personalized ceramic, wooden and metal pet urns — each one secure on a shelf, and none sealed shut before you decide.
Browse pet cremation urns
