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Blog - Foam Liner

Heat Seal, Pressure Sensitive, Foam and Disc Liners ... What's the Difference Anyway?

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Browse by Plastic Cap Size - diameter, mm, inch

Heat Seal Liners for Plastic Caps

  • Need special equipment to apply liner: Heat Induction Machine
  • Layers of material
  • Paper or foam backing
  • Foil piece on top (bonded together)
  • Liners we stock are made to adhere to many different materials (PP and Styrene)
  • Universal seal (designed to stick to most materials but not welded)
  • Need special machine to apply to container
  • Most effective way to prevent leakage, but it’s not 100%

Pressure Sensitive Liners for Plastic Tops

  • Never recommended for liquids
  • Made of polystyrene
  • Designed for use with dry products
  • Like a stronger post-it note
  • Not very sticky
  • Designed for tamper evidence
  • Very brittle by design, when liner is tampered with creases form in liner to show tamper evidence

Foam Liners for Plastic Lids

  • Good multipurpose liner
  • Enhances shelf life and sealing after it’s opened
  • The more you open and close the cap (over time), the less effective the liner becomes - Shelf life is very good though
  • Good Moisture barrier, but not leak proof
  • May help in a lot of cases but it is not designed specifically to prevent leakage in transit

Cosmetic Disc Liners

  • Mostly aesthetic
  • Helps keep barrier from outside, but not as effective as other liners
  • Best with dry products, creams, etc.
  • Best use is to keep the product off of the lid and inside the jar where it belongs
  • Best used with an unlined cap


Plastic Sealing Disks, Lined and Unlined Caps and Bulk Packed Liners - Buy Now!


Liquid Products, they don't have to leak!

Are you wondering how to package your liquid product? Are you worried that your packaging isn't going to hold up? Are you looking for packaging options that will solve a current problem? Sealing your packaging is very important when it comes to packaging, especially when you carry a liquid product. However, there are other aspects that you [...]

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