How to Replace Kilner 3 Litre Jar Rubber Seals

Quick Answer

If your Kilner 3 Litre jar isn't sealing properly, the rubber seal likely needs replacing. Use genuine Kilner Replacement Seals (pack of 6) and follow our simple diagnosis and replacement steps to restore a reliable airtight closure.

Diagnosis & Replacement Steps

• Symptom: The jar lid doesn't stay clipped down, you hear air escaping, or food spoils faster than expected. The rubber seal may appear cracked, hardened, or misshapen.
• Likely Cause: The rubber seal has worn out due to age, heat exposure, or repeated use. Kilner seals are consumable items and should be replaced periodically. Check the seal for visible damage. If it's hard or brittle, replacement is necessary.
• Corrective Action: Remove the old seal from the lid groove. Take a new Kilner replacement seal and press it evenly into the groove, ensuring no twists or gaps. Reattach the lid to the jar and clip both sides down firmly. After installing, test the seal by closing the jar and trying to lift it by the lid. A secure seal will hold the jar's weight.
• Stop / Choose Another Option: If the jar still fails to seal after replacing the seal, inspect the glass rim for chips or cracks. A damaged rim cannot form an airtight seal even with a new rubber seal. In that case, retire the jar from preserving use. Never use a chipped jar for food storage or canning.

Product Facts

• Rubber Replacement Seals For Kilner® 3 Litre Jars - Pack of 6: Kilner 6 Replacement Rubber Seals are suitable to use with the Round Clip Top Glass Storage Jars. These replacement seals are suitable for the 3 Litre Jars. Buying a pack of 6 ensures you have spares on hand for multiple jars or future replacements, and the genuine fit guarantees a proper seal.