Custom Food Packaging Boxes and Solutions

PolarShield® PET

A worthy option when moisture isn’t an issue.

When you desire strength and wet conditions aren’t a factor, turn to PolarShield® PET. It’s a perfect choice for frozen and bakery applications. Use it to create packages capable of going from shelf or freezer directly to a conventional or microwave oven. This eliminates excess packaging expenses. Beyond performance, PolarShield® PET also looks attractive enough for consumers to take to their dining table.


Features & Benefits

What you can expect from us:

Thermal Stability

An extruded barrier polymer, available in a clear option, enables performance from -40°F (-40°C) to 428°F (220°C).

Product Uniformity

A smooth surface delivers outstanding ink holdout and best-in-class printing consistency. Polymer coat-weight uniformity offers improved efficiencies and maximum throughput on high-speed forming and filling equipment.

Single Package Solution

Delivers savings and source reduction over alternatives that require outer cartons or wraps. The result is a cost-efficient packaging solution with an improved sustainability profile.

Heat Sealability

Outstanding heat-sealing performance across a range of technologies, including hot air, platen and microwave. This means you can expect improved efficiency and ultimate flexibility.

Best used with:

  • Frozen Foods
  • Retail Foods
  • Foodservice

Additional Product Information


  • All WestRock North American paperboard mills are certified to the SFI®, PEFC™, FSC™ Chain of Custody Standards. Contact your WestRock sales representative for certified fiber availability for this product.
  • Certificate Codes: SFI Certified Sourcing: NSF-SFI-CS-6S751, SFI CoC: NSF-SFICOC-6S751, PEFC: NSF-PEFCCOC-6S751, FSC Company Code: FSC-C104002.

Environmental & Product Safety

  • Notices under US California Proposition 65 and the EU REACH regulation are not required.
  • Elemental chlorine free (ECF) bleached fiber.
  • Meets heavy metal limits of the US Model Toxics in Packaging rules and Article 11 of EU Directive 94/62/EC.

This information is subject to change without notice.

Food Contact

  • Meets multiple national requirements for food contact packaging, e.g., US, Canada and the EU. Contact your sales representative for information on specific markets and end uses.
  • Kosher documentation available.


  • Produced at an ISO 9001 certified facility.

Paperboard Calculator

We understand that you rely on us for more than paperboard. In order to provide the best service possible, WestRock has developed roll, sheet and metric conversion calculators to make your job easier.

View the paperboard calculator


PrintKote PET specifications


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How can we help you meet your business goals? Contact a member of our team to learn more about our paperboard products and services.

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