How to Replace Kilner Screw Bands on Preserve Jars

By Kilner® - Iconic Glass Jars, Bottles & Equipment | Kilner® | Published: 2026-10-23

Category: How-to Guides

Learn when and how to replace Kilner preserve jar screw bands for a secure seal. Follow these simple steps to maintain your jars and avoid common mistakes.

Quick answer

Replace your Kilner screw bands every few seasons or when you see rust, dents, or warping. Use genuine Kilner replacement bands for a perfect fit and reliable seal.

Why screw bands need replacing

Screw bands hold the lid firmly during processing and storage. Over time, metal can corrode, bend, or lose tension. A damaged band may not hold the seal, leading to spoilage or broken seals. Replacing them is cheap insurance for your preserves.

When to replace vs. reuse

Inspect bands before each use. If the band is rusty, has sharp edges, or no longer screws on smoothly, replace it. Light surface rust can sometimes be scrubbed off, but deep pitting or dents mean it's time for new ones. Kilner recommends replacing bands every 2-3 preserving seasons for consistent performance.

Step-by-step: How to replace Kilner screw bands

1. Remove the old band: Twist the old screw band counter-clockwise until it comes off. If it's stuck, run the jar under warm water for a few seconds to loosen it. Do not pry it off with a knife—you risk chipping the glass rim. Check the old band for rust or dents before discarding.
2. Clean the jar rim: Wipe the jar rim and threads with a damp cloth to remove any food residue or sticky syrup. A clean surface ensures the new band seats properly and the seal forms without leaks. Let the rim air-dry completely before placing the lid.
3. Position the lid and new band: Place a clean Kilner lid (with a new rubber seal if needed) on the jar. Then screw the new Kilner screw band over it clockwise until it is finger-tight. Do not overtighten—the band should be snug but not forced. Overtightening can cause the lid to buckle and break the seal. Finger-tight is enough; use no tools.
4. Test the seal after processing: After water-bath or steam processing, let the jar cool undisturbed for 12 hours. Press the center of the lid—if it does not pop up, the seal is good. If it pops, refrigerate and use the contents within a few days. Label the jar with the date and store in a cool, dark place.

Recommended product

Preserve Jar Replacement Screw Bands - Set of 6: The Kilner Set of 6 Preserve Jar Screw Bands are designed to fit onto all sizes of Kilner® Preserve Jars and made from quality tin metal. 7.2cm in diameter. One set covers multiple jar sizes, so you always have a spare band ready when an old one wears out.
Preserve Jar Replacement Screw Bands - Set of 6