Demand for sustainable packaging coatings has grown steadily as brands respond to retailer requirements, consumer expectations, and incoming regulatory pressure. But alongside that demand, scrutiny of the claims brands make about their coatings has intensified. According to Brownstein Hyatt Farber Schreck, brands that use broad or unsubstantiated sustainability language face both reputational and legal exposure, regardless of intent.

The problem is not that packaging teams are acting in bad faith. The problem is that terms like “eco-friendly coating” or “sustainable packaging” are difficult to substantiate because they do not correspond to a specific, testable property. For packaging, sustainability, and marketing teams, that gap between intent and verifiable claim is where risk lives. This post provides a practical framework for communicating coating performance responsibly, grounded in what is documentable and defensible.

What Sustainable Packaging Coatings Actually Claim to Do

Before refining the language, it helps to clarify what performance attributes are actually in scope. “Sustainable” is not a coating property. Repulpability, recyclability, and bio-based material content are properties, and each requires different evidence.

Repulpability refers to whether a coated substrate can be broken down and processed in a paper recycling facility without disrupting the pulping process. Recyclability refers to whether a material can be collected, sorted, and reprocessed in practice, which depends heavily on infrastructure availability. These are related but distinct attributes, and conflating them is one of the most common sources of overclaiming in coated paper applications.

A coating’s sustainability profile also depends on where the product is sold. Water-based emulsions and plant-derived coatings address real performance gaps and reduce reliance on polyethylene-based alternatives, but they are not automatically “sustainable” without data to support that claim. Recyclable paper barrier coating claims are only meaningful when the recycling infrastructure to process that substrate exists in the specific markets where the product reaches consumers.

How Repulpability Is Tested and Verified

Repulpability claims require supporting test data to be defensible, and the industry standard reference point is the test methods published by TAPPI (Technical Association of the Pulp and Paper Industry). According to SGS-IPS Testing, TAPPI methods are widely used to evaluate whether coated paper and board substrates can be successfully repulped under mill-representative conditions.

Passing a repulpability test means that a coated substrate can be processed without significant yield loss or contamination under the conditions defined by that test protocol. It does not automatically mean the substrate is recyclable across all collection programs, nor does it establish a recyclability claim for a specific geography. These distinctions matter when translating test results into external communications.

Coating chemistry, substrate type, coat weight, and processing conditions all affect test outcomes. Claims should be scoped to reflect what was actually tested, using language such as “demonstrated repulpability under TAPPI test conditions” rather than a blanket recyclability assertion.

Understanding the Standards Behind Recyclable Paper Barrier Coating Claims

For teams building or reviewing external claims, How2Recycle is the most widely referenced voluntary framework in North American packaging. Administered by the Sustainable Packaging Coalition (GreenBlue), How2Recycle determines recyclability designations based on three factors: collection access rates, sortation infrastructure, and end-market reprocessing capability. According to Atlantic Packaging, waxes for packaging and other coated paper substrates may require repulpability testing before a favorable How2Recycle label can be assigned.

How2Recycle’s assessment framework distinguishes between packaging that meets the threshold for a “recyclable” label and packaging that is “recyclability-challenged” based on current infrastructure. That distinction is a useful reference when positioning a coated substrate in external communications. Packaging that does not yet qualify as recyclable under the framework may still be on a credible path toward that designation, and How2Recycle publishes guidance for communicating future recyclability claims accurately.

When referencing How2Recycle’s methodology or standards in external communications, the language should clearly reflect what has been assessed and by whom. Stating that a substrate was evaluated against How2Recycle criteria is accurate; implying that a How2Recycle label or certification has been granted when it has not is a form of overclaiming in its own right, and should be avoided.

Common Overclaims and How to Avoid Them

Claiming “recyclable” without qualification

A recyclability claim without context around recycling stream, geography, or access rates leaves significant room for challenge. According to EcoEnclose’s analysis of California’s SB 343, claims must reflect whether recycling infrastructure is actually available to consumers at the required access threshold, not whether a material is technically capable of being recycled. A more defensible version scopes the claim to the specific stream and region where processing is available.

Using “compostable” or “biodegradable” without certification

Composability claims require third-party certification against a recognized composting standard — such as ASTM D6400 for compostable plastics or ASTM D6868 for compostable coatings and films applied to paper — before they can be made responsibly. “Biodegradable” claims are particularly high-risk without supporting evidence, as breakdown rates and conditions vary significantly by material and environment, and landfill conditions generally limit aerobic biodegradation for most substrates.

Stating a coating is “sustainable” without a verifiable anchor

“Sustainable coating” as a standalone claim is difficult to defend because it is not tied to a measurable property. Grounding the language in specifics, such as “repulpable under TAPPI test conditions,” “water-based formulation with no PE laminate,” or a recyclability claim scoped to a named recycling program and a defined geography, transforms a vague assertion into a substantiated one. According to Gasilov Group, website copy carries the same regulatory exposure as on-pack language, so internal review processes should apply equally to both.

How to Align Claims with Testing and Supply Chain Reality

Building defensible claims requires working backward from documentation, not forward from marketing intent. The starting point is what your coatings supplier can provide: repulpability test results, technical data sheets, material safety data, and any compliance references tied to specific test standards.

From there, claims need to be mapped to geography. Access rates for paper recycling vary significantly by region and packaging format. A claim that is accurate in markets with robust paper recycling infrastructure may not hold in regions where collection access is limited. The claims framework should reflect the markets where the product is actually sold and consumed.

Finally, review processes should involve legal, sustainability, and technical teams before any claims go external. The regulatory exposure from website copy is equivalent to on-pack claims, and alignment across those functions reduces the risk of language that is accurate in one context being misread in another.

Precision as a Long-Term Brand Asset

The goal of tightening sustainability language is not only risk reduction. Accurate repulpable coating claims and clearly scoped recyclability statements also build credibility with retailers, certification bodies, and consumers who are increasingly capable of identifying unsupported claims.

A practical approach is phased: identify what can be claimed now based on available test data and supplier documentation, and define what requires additional testing, certification, or infrastructure development before a claim is ready. That phased approach gives teams a clear path rather than a choice between overclaiming and saying nothing.

Working with a technically transparent coatings supplier strengthens every stage of that process. Supplier documentation, including repulpability test data and technical data sheets, is a foundational input for building claims that hold up under regulatory review. 

IGI Wax’s water-based emulsions line, which includes products like Vapor-Guard, Aquaban, and Barrier-Grip, is formulated to support recyclability and repulpability in paper and corrugated applications, as documented in their product technical data. For teams exploring sustainable solutions in wax and coating formulation, material transparency from the supply chain side is an increasingly critical input.