Double-Lok XT 28mm

Plastic Closures for Carbonated Soft Drinks

  • Primary Market Segments Served:

    Carbonated Soft Drinks

  • Application/Fill Processes:

    Cold/Ambient-Fill, Carbonated

  • Material Types:


  • Closure Diameters:


  • Bottle Finishes:

    1810, 1815, 1816, 1817, 1820, 1823

  • Bottle/Package Types:

    Plastic Non-Returnable Bottles, Plastic Returnable Bottles

  • Knurl Options:

    60, 120

  • Seal Types:

    Two-Piece Lined

  • Tamper Evidence:

    Tamper Evident Band - Standard

  • Brand Names:


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Extreme conditions call for extreme packaging. That’s why CSI has developed the Double-Lok XT closure. For beverages packaged in PET bottles, this cap maximizes CO2 sealing performance and product freshness under the most demanding conditions.

CSI research shows that filled PET bottles can be subjected to extreme “temperature cycling” – from 40˚ F to over 135˚ F. These conditions can cause shrinkage of the heat-sensitive PET material, which can cause a gap to develop between the bottle finish and the closure. The result is loss of CO2 and product freshness.

Double-Lok XT improves the mechanical seal and maximizes product freshness in conditions where extreme temperatures can cause package leakers throughout the distribution channel. CSI's proven application performance and capping equipment provides bottlers with the best sealing performance in the industry under extreme temperature cycling conditions.

Extreme Performance When the Heat Is On

  • Innovative Double-Lok XT liner maximizes seal integrity and product freshness using a plug-side-seal design
  • Double-Lok XT uses the same effective lining material as CSI’s Universal Seal closure liners
  • Improved, robust removal torque performance across various spindle speed changes
  • Industry-leading application performance
  • Patented tamper-evident band design offers safe package opening without compromising bottling performance
  • Under-the-Cap Promotion – video-jet or laser capable
  • Optimal performance with Cap-in-Head equipment configurations

Total Closure & Capping Systems Solutions

  • In addition to quality closures, CSI provides capping equipment and unparalleled customer and technical service, globally.
  • CSI's closure systems solutions help customers maximize profits by increasing the marketability of their brands and optimizing their total cost of operations.
Not all closures are produced in all regions.
Please contact us for more information.