The Vented Seal Liner is a specialized cap liner engineered for products that generate internal pressure during storage — such as carbonated beverages, fermented foods, certain chemical formulations, and gas-emitting products. Unlike standard liners that form a complete seal, the vented design allows for controlled pressure release, preventing cap blow-off and container deformation while still maintaining an effective closure.

Available in sizes from 30mm to 70mm and in thicknesses of 1.0mm to 1.5mm, vented liners from Nextech Packaging are an essential component for any packaging line handling pressure-sensitive products. If you are unsure whether a vented liner is the right solution for your application, our team has over 30 years of industry experience and can help you determine the best sealing approach for your product and container type.