FAQs and Helpful Tips

Wadding refers to the “wad” fitted inside a cap. It sits between the closure and the bottle or jar opening, helping to form an additional airtight barrier when the cap is applied. It is often a separate foam liner or an integrated component built into the cap itself. Not all caps include or require wadding. Please refer to the individual product page for specific closure details and component information.   Why it’s important: Prevents leaks: The liner forms a barrier that helps stop liquid from escaping, especially during transport or handling. Improves sealing: It helps create a tighter, more consistent seal between the cap and the container. Protects contents: Wadding can help reduce exposure to air, moisture, and contaminants. Maintains product quality: For some products, it helps preserve freshness and shelf life. Supports compatibility: Different liner types are suited to different products, such as oils, liquids, or chemicals.