Energy efficiency and scope 3: redefining coating performance

Under frameworks such as the Corporate Sustainability Reporting Directive (CSRD) and wider EU sustainability legislation, scope 3 emissions are becoming a formal requirement. For coatings manufacturers, this shifts part of the focus downstream. The energy consumed by customers during application, processing, and maintenance becomes a measurable component of product impact. As a result, coatings formulation is evolving to include energy efficiency and lifecycle emissions as explicit performance parameters alongside traditional technical criteria.

The influence of coatings on energy consumption is concentrated in three areas: curing, application efficiency, and durability. Curing remains the most energy-intensive stage, particularly in continuous industrial processes. Even modest reductions in curing temperature or dwell time can deliver meaningful savings when scaled. Advances in resin chemistry, crosslinker design, and catalyst packages now allow coatings to achieve full performance under reduced energy input.

Application efficiency represents a second, often underexploited opportunity. Losses through overspray, rework, or inconsistent film formation all contribute to unnecessary energy use. Formulations that support stable spray behaviour, consistent film build, and reduced defect rates can materially improve overall process efficiency.

Durability is the third major lever. A coating that extends maintenance intervals effectively reduces lifecycle energy demand. In many cases, the cumulative energy associated with inspection, repair, and recoating exceeds that of the initial application. Enhancing long-term resistance properties therefore links technical performance directly to emissions reduction.

Responding to scope 3 requirements requires a shift from component optimisation to system-level formulation design. Low-temperature curing technologies are central to this transition. By enabling coatings to cure at reduced temperatures, formulators allow customers to lower oven energy consumption or increase throughput without additional energy input. The formulation challenge lies in achieving sufficient reactivity while maintaining storage stability and consistent film formation.

Reducing film thickness offers an additional and highly effective route to lowering energy demand. Improved pigment dispersion, optimised refractive index matching, and advanced additive packages now allow coatings to maintain opacity and protection at lower film builds. This reduces both material usage and curing energy, but requires careful control to avoid compromising coverage, edge protection, or long-term durability.

Process simplification is equally important. Coatings that eliminate entire layers, such as primer systems, can remove multiple curing steps. Direct-to-metal and multifunctional coatings are increasingly relevant, provided they can deliver comparable corrosion protection and adhesion across a range of substrates. In this context, formulation must balance a broader set of requirements within a single system, often requiring more sophisticated resin and additive combinations.

Alternative curing technologies such as UV, dual-cure, or ambient-cure systems further illustrate how formulation can influence energy profiles. While not universally applicable, these approaches highlight the potential to significantly reduce or eliminate thermal curing energy under the right conditions.

To respond effectively to the new requirements, formulation design must become more application-centric and data-driven. Several practical principles can support this transition.

Firstly, formulation should be developed with a clear understanding of the customer’s process window rather than an idealised laboratory condition. This involves designing coatings that perform reliably at the lower end of cure temperature ranges or under variable line speeds, ensuring that energy savings are achievable under real operating conditions.

Secondly, it is increasingly important to consider energy as a quantitative design parameter during development. Instead of evaluating performance solely in terms of hardness, adhesion, or chemical resistance, formulators should also assess energy input per square metre coated, or per unit of output. This encourages trade-off decisions that favour overall system efficiency rather than isolated property optimisation.

Thirdly, greater emphasis should be placed on robustness and consistency. A formulation that tolerates variation in substrate condition, application method, or environmental factors will inherently reduce rework and reject rates. This has a direct impact on both energy consumption and emissions, even if the individual formulation components are unchanged.

Finally, collaboration with application engineers and end-users should be integrated early in the development process. Many energy savings are only realised when formulation and process are aligned. For example, a coating designed for lower viscosity and improved transfer efficiency may require adjustments in spray equipment or electrostatic settings to deliver full benefit.

In practice, a small number of structural design choices often deliver disproportionate impact:

For these strategies to translate into tangible benefits under CSRD, they must be supported by credible data. Customers increasingly require clear, quantitative evidence of how coatings reduce energy consumption and emissions.

This places new demands on coatings suppliers to provide product carbon footprint data, energy-saving calculations, and lifecycle-based comparisons. Demonstrating the impact of a reduction in cure temperature or film thickness in terms of kilowatt-hours saved or emissions avoided enables customers to incorporate these benefits into their scope 3 reporting. The credibility of such data depends on transparent assumptions and alignment with recognised methodologies.

The coatings value proposition is expanding beyond performance and cost to include productivity and environmental impact. Products that enable faster processing, lower energy consumption, and reduced lifecycle emissions provide a differentiated offering in a regulatory environment that increasingly rewards measurable sustainability benefits.

This shift also reinforces the need for closer collaboration across the value chain. Energy and emissions reduction is not solely a formulation challenge; it depends on how coatings are applied, cured, and maintained in practice. Formulators who engage early with customers to understand these constraints will be better positioned to deliver solutions that translate into real-world impact.

Energy efficiency has always been a driver of innovation in industrial coatings, but it is now becoming a formalised and measurable requirement linked directly to scope 3 emissions. Through deliberate formulation strategies—focused on curing behaviour, application efficiency, and durability—coatings can play a significant role in reducing downstream energy use.

By embedding energy and carbon considerations into formulation design, coatings manufacturers can align with evolving regulatory expectations while delivering clear operational and environmental value to their customers. In the European context, this integrated approach is rapidly becoming essential for long-term competitiveness.