How to Replace Kilner Preserve Jar Lid Seals

Quick answer

To replace Kilner preserve jar lid seals, remove the old rubber seal from the two-piece lid, fit the new seal evenly around the lid rim, and press the lid onto the jar before screwing the band tight.

Step-by-step replacement guide

1. Remove the old seal: Unscrew the metal band and lift the lid off the jar. Gently pull the old rubber seal out of the groove on the underside of the lid. If it is stuck, use your fingernail or a blunt tool to ease it out. Check the old seal for cracks or brittleness—if it is worn, replacement is due.
2. Fit the new seal: Take a new replacement seal and press it evenly into the groove around the lid. Ensure it sits flat and is not twisted or bunched. Run your finger around the groove to confirm it is seated properly. A twisted seal can break the vacuum—take time to smooth it out.
3. Attach the lid and band: Place the lid on the jar, rubber seal facing down. Screw the metal band on until it is finger-tight—do not over-tighten. The band should be snug but not forced. Over-tightening can damage the seal or make the lid hard to remove later.
4. Test the seal: After processing your jars, wait for them to cool and then press the center of the lid. If it stays down and does not pop back, you have a good vacuum. If it pops, the seal may not have seated correctly—check and repeat. A popped lid means the seal failed; reprocess or refrigerate the contents.

Product facts

• Kilner® Preserve Jar Replacement Lid Seals - Set of 12: This set of 12 replacement rubber seals is designed to fit Kilner preserve jar lids and is compatible with Kilner two-piece lids, which include a replaceable vacuum seal and a metal screw band. Having a spare set on hand means you can replace worn seals immediately and keep your jars airtight without waiting for a delivery.