Electrostatic discharge control is often treated as a product choice: apply an ESD paint or coating, achieve a resistance reading, and assume the surface is protected. In real applications, the more important question is whether that dissipative behaviour remains stable throughout the working life of the part, surface or environment.

This is where the idea of lifetime dissipation matters. A surface may pass an initial resistance test but still become unreliable if conductivity changes through wear, cleaning, contamination, humidity variation or breakdown of the conductive pathway.

For ProShieldESD applications, permanent protection does not mean dismissing ESD paints or ignoring validation. It means using an engineered static-dissipative coating approach where long-term stability, substrate compatibility and real operating conditions are central to the decision.

The Real Issue Is Not Paint vs Coating

The word paint is often used by customers because it is familiar. In many markets, “ESD paint” simply means a surface-applied static-control coating. That language should not be ignored, because it reflects how people search, buy and describe the problem.

However, paint language can also make static control sound simpler than it really is. The technical question is not whether the product is called a paint or a coating. The real question is how the electrical behaviour is created, how stable it remains, and whether it is suitable for the application risk.

The Problem with Short-Term Surface Conductivity

Traditional ESD paints and conductive coatings can be useful in the right application, especially where the risk is controlled, the environment is not aggressive and the surface can be inspected or maintained. The problem comes when an initial surface resistance reading is treated as proof of long-term protection.

Many conventional systems rely on conductive fillers such as carbon or metal particles. If the filler network becomes disrupted, uneven or exposed to wear, the surface can become inconsistent. In some environments, that creates both performance risk and maintenance cost.

• Performance drift can occur if the conductive pathway changes over time.
• Reapplication cycles increase cost, downtime and process disruption.
• Wear and cleaning can affect surface resistance and consistency.
• Filler-based systems may create contamination concerns in sensitive environments.
• Low initial cost can become expensive if maintenance is frequent.

What Lifetime Dissipation Means

Lifetime dissipation means maintaining useful, repeatable static-dissipative behaviour for the intended working life of the coated item or surface. It is not just about making a surface conductive on day one.

In practical terms, lifetime dissipation means the coating system, substrate and operating environment must work together. The surface must stay within the required resistance range, dissipate charge in a controlled way and avoid becoming either too insulating or too conductive for the application.

• Stable surface resistance over the intended service period
• Controlled dissipation rather than uncontrolled conductivity
• Reduced dependence on repeated repainting or reactivation
• Compatibility with the substrate and operating environment
• Validation against the required ESD performance target

How ProShieldESD Supports Permanent Static Control

The ProShieldESD coating platform is designed to create static-dissipative surfaces without relying on unstable filler distribution as the main performance mechanism. This allows controlled ESD behaviour to be engineered into a wide range of surfaces where long-term consistency matters.

That does not mean one coating specification is right for every application. Plastics, industrial equipment, floors, packaging, tools, fixtures and hazardous-area components all place different demands on adhesion, durability, cleaning resistance, flexibility and surface resistance.

The correct approach is to define the ESD target, understand the substrate, assess the environment and then validate the coating system under realistic conditions.

Permanent Does Not Mean Universal

Permanent ESD protection must be understood correctly. It does not mean that every coated surface becomes indestructible, maintenance-free or suitable for all environments. It means the dissipative behaviour is designed to remain stable for the defined application when the coating is correctly selected, applied and validated.

Some applications may still require abrasion testing, chemical resistance checks, cleaning validation, UV exposure assessment or periodic resistance monitoring. This is especially important where the surface is exposed to outdoor conditions, aggressive cleaning, mechanical wear or ATEX-related risk.

• Substrate adhesion must be proven.
• The required resistance range must be defined.
• Cleaning and wear conditions must be understood.
• Environmental exposure must be considered.
• Critical applications should be tested before rollout.

ESD Paints, Coatings and Lifetime Dissipative Systems

Where Lifetime Dissipation Matters Most

Lifetime dissipative coatings are most useful where static-control failure would create reliability, safety, handling or production risk. The higher the consequence of ESD failure, the less sensible it becomes to rely only on a short-term surface reading.

Related ProShieldESD Guidance

For a broader explanation of the coating system, start with the ProShieldESD coating platform. For practical application routes, review the ProShieldESD applications page. For the difference between dissipative and conductive behaviour, see Static Dissipative vs Conductive Coating.

For selection guidance, see How to Choose the Right Static Control Approach. For substrate-specific applications, review anti-static coating for plastic components and ESD coating for explosive and ATEX environments.

For supporting insight articles, see Dispelling the Myths About Static Control Paints and Why Carbon-Filled ESD Paints and Moulded Anti-Static Plastics Can Fail.

Why Choose SCH Services?

SCH Services helps customers select, test and apply coating systems where static control, coating durability and process reliability matter. We support projects from initial substrate review through sample evaluation, application development and production coating.

• Technical support for ESD coating selection and validation
• Experience with plastics, industrial equipment, packaging and specialist surfaces
• Practical assessment of resistance targets, adhesion, wear and environmental exposure
• Subcontract coating, development trials and process support available

Contact SCH Services to discuss a ProShieldESD coating application, sample evaluation or static-control requirement.

Disclaimer: This article provides general technical guidance only. ESD coating selection, resistance targets, durability expectations and suitability for safety-critical or regulated environments must be validated against the relevant standards, substrate conditions, operating environment and qualification tests for the specific application.

Electrostatic discharge (ESD) protection is essential across electronics manufacturing, aerospace, automotive and medical environments. However, many traditional solutions are designed to meet specifications in isolation rather than maintain stable performance during real use.

Common approaches such as carbon-filled moulded products and filler-based ESD paints can appear effective initially, but often introduce variability, wear-related degradation and limitations when scaled across full systems.

This creates a gap between compliance and real-world reliability — particularly where surfaces, environments and usage conditions vary over time.

The Limitations of Traditional ESD Solutions

1) Moulded carbon-filled plastics

Carbon-filled boxes and moulded components provide fixed geometry solutions with embedded conductivity. While effective in controlled use cases, they are inherently inflexible and difficult to adapt across varied applications.

Surface performance can change with wear, contamination or handling, and scaling this approach across complex systems often results in inconsistent control.

2) Filler-based ESD coatings

Most ESD paints rely on carbon or metal fillers to create conductive pathways. These systems are mechanically dependent — meaning performance is influenced by particle distribution, surface wear and environmental exposure.

Over time, fillers can migrate, wear or become unevenly distributed, leading to patchy conductivity, contamination risk and the need for reapplication.

3) Lack of system-wide compatibility

Traditional approaches struggle to provide consistent performance across plastics, foams, packaging, equipment and structural surfaces. This makes it difficult to standardise ESD control across an entire facility.

Most ESD failures are not immediate — they emerge over time as materials wear, environments change and surface behaviour drifts outside controlled ranges.

A Different Approach: Polymer-Based Dissipative Coatings

ProShieldESD uses a polymer-based dissipative system rather than relying on conductive fillers. Instead of creating conduction through dispersed particles, the coating forms a controlled, uniform surface layer designed to maintain stable electrical behaviour.

This shifts ESD protection from a product-based approach to a surface engineering approach — allowing static control to be applied directly where it is needed, rather than constrained by predefined shapes or materials.

Key characteristics

• Uniform behaviour – consistent surface performance without dependence on filler distribution.
• Reduced drift – designed to maintain stability under wear and environmental exposure.
• Substrate flexibility – applicable across plastics, foams, packaging, equipment and floors.
• Clean surface profile – avoids particle shedding associated with filler-based systems.

What This Means in Practice

Moving from discrete ESD products to coating-based surface control enables a more consistent and scalable approach to static management.

• Reduced need for replacement of moulded ESD items.
• Lower maintenance compared to repaint cycles.
• Improved consistency across mixed materials and surfaces.
• Greater control over how and where static behaviour is managed.

This is particularly relevant in environments where multiple materials, handling processes and environmental conditions interact.

Continue Exploring

Understanding ESD control requires looking beyond materials to behaviour and system design. The following resources expand on key concepts and solution pathways:

• Why filler-based ESD paints can fail over time
• Static dissipative vs conductive coatings explained
• Why static control must be continuous, not fixed
• ProShieldESD coating platform overview
• Application-specific ProShieldESD solutions

Why Choose SCH Services?

• Process-led approach to static control, not just product supply
• Capability across coatings, substrates and application methods
• Support from concept through to implementation and validation
• Integration with wider coating and surface engineering expertise

This content is provided as general technical guidance. Final material selection and process validation should be confirmed through application-specific testing and relevant industry standards.

Parylene coating is often viewed as a machine-led vacuum deposition process. In practice, many of the problems seen in production are caused before or after deposition, not inside the chamber itself.

Adhesion failure, masking leakage, poor fixture design, uneven coating results, contamination and difficult rework are usually process-control problems. Training is therefore not just about learning how to operate a Parylene system. It is about understanding how each stage affects coating reliability.

This post explains why structured Parylene training is important for organisations building in-house capability or improving an existing process.

Where Parylene Processes Typically Go Wrong

Parylene is a high-performance coating, but it is not forgiving when the surrounding process is poorly controlled. Small weaknesses in preparation, handling or masking can create large reliability problems later.

• Surface contamination can reduce adhesion even when deposition parameters are correct.
• Poor masking design can cause leakage, shadowing, difficult removal or component damage.
• Incorrect fixturing can restrict vapour access or create inconsistent coating distribution.
• Weak inspection methods can miss defects until qualification or field use.
• No defined rework route can turn small production issues into expensive scrap.

Why Training Matters

Effective Parylene training helps operators, engineers and quality teams understand the full coating route rather than treating deposition as an isolated step.

Good training should connect the practical decisions made on the shop floor with the final coated result. This includes how parts are cleaned, how masking is selected, how fixtures are loaded, how coating thickness is checked and how defects are investigated.

For organisations introducing Parylene in-house, this reduces the learning curve. For established users, it helps identify process weaknesses before they become repeat production failures.

Core Areas a Parylene Training Programme Should Cover

A useful training programme should be practical, process-led and matched to the parts being coated. It should not only explain Parylene chemistry, but also how to control the process in real production.

Training at Your Site or in a Controlled Facility

Parylene training can be delivered in different ways depending on the maturity of the process and the needs of the team.

Training at a specialist facility

Facility-based training allows operators and engineers to learn in a controlled production-style environment. This is useful when teams need to understand the complete coating workflow before applying the knowledge to their own products.

Training at the customer site

On-site training is often the stronger option when a team already has equipment installed, specific product families to coat or live process issues to solve. It allows training to be connected directly to the equipment, assemblies, masking methods and quality expectations used in production.

For organisations planning in-house capability, SCH provides dedicated Parylene training and support covering practical process control, operator knowledge and production readiness.

Training Should Continue After the Course

Parylene capability is built over time. The first training session gives the team a foundation, but real process strength comes from applying that knowledge to production parts, reviewing results and improving controls.

Ongoing support may include troubleshooting, process review, masking improvements, inspection guidance, fixture development and support for unusual or sensitive assemblies.

Where the process is still being developed, it is also useful to connect training with wider Parylene coating solutions, including coating services, equipment support, masking and process development.

Why Choose SCH Services?

SCH Services supports manufacturers with practical coating knowledge, process development and hands-on production experience across conformal coating, Parylene and advanced functional coatings.

• Practical support from coating engineers, not generic classroom-only training.
• Experience with masking, inspection, rework, repair and process control.
• Support for organisations developing or improving in-house coating capability.
• Clear route from training into process support, coating services or equipment implementation.

To discuss a Parylene coating training requirement, contact SCH Services through the contact page.

Disclaimer: This article is general technical guidance only. Parylene process decisions, training requirements and production controls should be assessed against the specific assembly, coating specification, reliability requirements and applicable qualification standards.

Plasma cleaning is widely promoted as a universal solution for adhesion — but in practice, its effectiveness depends entirely on the underlying failure mechanism. Used correctly, plasma is one of the most effective tools available for improving coating adhesion and surface performance. Used incorrectly, it adds cost and complexity without solving the underlying problem.

Quick Takeaway

• Plasma improves adhesion by increasing surface energy, not just cleaning
• It is most effective on low-energy materials and adhesion-critical applications
• It does not fix process instability (viscosity, thickness, curing)
• Use plasma based on failure mechanism — not as a default step

What Plasma Cleaning Actually Does

Plasma is an energy-rich ionised gas (often referred to as the fourth state of matter) created by applying electrical energy to a gas. When applied to a surface, it interacts at a molecular level. In conformal coating and Parylene processes, plasma does two key things:

• Removes organic contamination – including light residues, oils and some release agents that interfere with coating adhesion (see surface preparation and cleanliness)
• Increases surface energy – making the surface more “wettable”, allowing coatings to spread and bond more effectively

This second effect — surface activation — is often more important than the cleaning itself.

Different plasma gases can produce very different cleaning, activation and oxidation effects. Oxygen, argon, nitrogen and mixed-gas plasma processes do not behave the same way on PCB assemblies or polymer surfaces. For a deeper technical explanation, see How Plasma Gas Chemistry Changes PCB Surface Preparation Before Parylene.

Why Plasma Works When Solvent Cleaning Doesn’t

Traditional cleaning methods (IPA wipes, solvent washes) remove bulk contamination, but they do not fundamentally change the surface energy of a material. This is why coatings can still fail after “clean” processing:

• Low surface energy plastics resist wetting
• Thin contamination layers remain undetected
• Surface chemistry prevents proper bonding

Plasma addresses these limitations by modifying the surface at a molecular level, not just removing visible contamination.

Where Plasma Cleaning Makes the Biggest Difference

Plasma treatment is most valuable in specific, high-risk scenarios:

• Adhesion failures – particularly on plastics, connectors and difficult substrates
• Parylene coating – where adhesion is highly sensitive to surface condition
• Low surface energy materials – such as certain polymers and moulded components
• High-reliability applications – aerospace, medical and defence electronics

In these cases, plasma can significantly improve coating consistency and long-term reliability.

Where Plasma Cleaning Is Often Overused

Plasma is not a universal solution. In many cases, it is introduced without addressing the real root cause of coating issues. Common misapplications include:

• Using plasma to compensate for poor upstream cleaning
• Applying plasma where standard cleaning already provides sufficient adhesion
• Expecting plasma to fix process control issues (viscosity, thickness, curing, environment)

If the coating process itself is unstable, plasma will not fix it. Issues such as viscosity control, curing behaviour and thickness variation must be addressed at a process level (see process control fundamentals).

Atmospheric Plasma vs Vacuum Plasma

For conformal coating and Parylene pre-treatment, atmospheric plasma is commonly used because it can be integrated directly into production lines. Typical systems include:

• Plasma jets or nozzles (manual or robotic)
• Power generators controlling plasma energy
• Process control systems for repeatability

This allows targeted treatment of specific areas without the need for vacuum chambers. For further technical background on plasma physics and ionisation processes, see plasma (physics).

The effectiveness of both atmospheric and vacuum plasma systems also depends heavily on the selected gas chemistry and the interaction with the substrate materials being treated. Different gases can produce very different activation and oxidation behaviour during preparation.

The Real Insight: Plasma Is About Surface Energy, Not Just Cleanliness

The biggest misunderstanding in plasma cleaning is treating it as a “better cleaning method”. In reality, its primary role is surface activation — changing how a coating interacts with the substrate. This is why plasma can transform coating performance in some cases, while making little difference in others. If the failure mechanism is adhesion-related, plasma can be critical. If the failure mechanism is process-related, plasma is irrelevant.

Need Help Understanding Whether Plasma Is Required?

Plasma cleaning should be selected based on the failure mechanism, not added as a default process step. If you are seeing adhesion issues, de-wetting, or inconsistent coating behaviour, we can help determine whether plasma is the right solution — or whether the issue sits elsewhere in the process (see common coating failure causes). Contact us to discuss your application.

This content is provided for general technical guidance only. Coating performance depends on specific materials, design, environment and process controls. All solutions should be validated through testing and qualification before production use.