IN Brief:
- Croxsons has secured exclusive UK distribution rights for PANO's BLUESEAL PVC-free twist-off closures.
- Twelve sizes cover cold and hot filling, pasteurisation to 95°C, and sterilisation to 121°C.
- PANO produces more than one billion closures annually and supplies product-specific carbon-footprint data for its range.
Croxsons has signed an exclusive UK distribution agreement with German closure manufacturer PANO Verschluss for its BLUESEAL PVC-free twist-off caps, adding a new closure option for food manufacturers using glass jars across cold-fill, hot-fill, pasteurised, and sterilised applications.
The range covers 12 closure sizes and is designed for cold filling, hot filling, pasteurisation at temperatures up to 95°C, and sterilisation up to 121°C. PANO manufactures more than one billion closures a year, giving the system an established industrial production base rather than the limited availability often associated with newer food-contact material alternatives.
BLUESEAL replaces conventional PVC-containing sealing compounds with a PVC-free system identified by a blue sealing ring inside the cap. The technology was developed in response to retailer demand in Germany and is now being positioned for UK food producers through Croxsons’ glass packaging portfolio.
The seal is the critical interface between the metal closure and the jar finish. It has to compensate for dimensional tolerances, maintain vacuum, resist the chemical environment created by the food, and continue performing after filling, cooling, pasteurisation, or sterilisation. Small changes in compound behaviour can affect application torque, seal integrity, opening force, migration performance, and shelf life.
A closure conversion is consequently a validation project rather than a straightforward purchasing change. Processors need to confirm that existing capping equipment applies the new specification consistently, that vacuum develops and holds correctly, and that the liner remains stable through the intended thermal process. Acidic sauces, oily products, preserves, pickles, and sterilised foods can place very different demands on the same nominal cap diameter.
Line performance has to be checked at production speed. Twist-off closures pass through sorting, feeding, cap placement, torque application, and inspection systems, and minor differences in geometry or liner friction can create stoppages or elevated reject rates. A closure that seals reliably in a laboratory still has to feed cleanly through a high-speed capper for thousands of cycles without damage to lugs or finishes.
Croxsons’ position as a glass packaging supplier may simplify some of that work because the jar and closure can be assessed together. Matching finish dimensions, tolerances, cap specifications, and process requirements through one packaging relationship reduces the number of interfaces a food manufacturer has to manage when investigating sealing problems or qualifying a new format.
PANO is also positioning BLUESEAL around manufacturing emissions. The company says closure production uses 100% renewable electricity and that gas-fired thermal drying was replaced in 2020 by induction and ultraviolet processes. Croxsons reports an 81% reduction in carbon dioxide per closure between 2011 and 2025, supported by verified product carbon-footprint data for individual specifications.
Those figures relate to closure manufacture rather than the environmental performance of the complete jar-and-cap system. Glass production, transport, filling temperatures, product losses, closure weight, recycling, and end-of-life recovery all influence the full packaging footprint. Supplier-level carbon data nevertheless gives food manufacturers a more specific input for packaging and Scope 3 assessments than a generic material claim.
Chemical composition is becoming equally important. European food-contact packaging rules are tightening around substances of concern, including PFAS, while retailers and brand owners are asking for more detailed evidence on coatings, sealants, inks, adhesives, and barrier materials. PVC and PFAS are separate issues, so a PVC-free liner does not by itself establish PFAS compliance, but both trends are increasing scrutiny of components that historically sat deep inside supplier specifications.
Recent food-contact packaging developments have shown the same movement towards specifications that combine chemical compliance with grease, heat, sealing, and processing performance. Closure systems face an equivalent test because regulatory improvement is commercially useful only when the replacement survives the thermal and mechanical conditions already built into production.
Supply continuity is another part of the decision. Food plants have spent recent years qualifying alternative packaging sources after energy shocks, raw-material disruption, and logistics constraints exposed narrow supply chains. An established manufacturer producing more than one billion caps a year gives procurement teams another route, although resilience still depends on production locations, tooling, inventories, and the speed at which substitute specifications can be approved.
The Croxsons agreement therefore adds more than a material claim to the UK closure market. It gives jar users access to a PVC-free twist-off range across several thermal-process categories, backed by large-scale manufacturing and data on production emissions. Adoption will still be determined on the line, where cap feeding, torque, vacuum, migration, shelf life, and supply reliability have to match the packaging specification already in place.
A jar cannot leave the factory as finished food until that seal is dependable. BLUESEAL’s commercial prospects in the UK will rest on whether it can meet that routine requirement across enough products and capping systems to turn an alternative liner chemistry into an unremarkable production standard.
