This post is based on a published Feature Article, originally published on Military Systems & Technology on April 13, 2026.
There’s a phrase you hear now and again in defence programmes: it passed the test. Said with confidence, sometimes relief. What tends not to follow is what happens after, after the vibration cycles stack up, after humidity gets in where it shouldn’t, after a bit of contamination quietly wakes up and starts interfering with things nobody thought to check twice.
That’s roughly where Advanced Coating comes in. Not at the design stage, but later on, when reliability either holds up or starts to slip.Founded in 1989 and now part of the Novaria Group, the company has carved out a very specific role in aerospace, defence and high-reliability electronics: Parylene conformal coating, applied with a level of process control that’s closer to manufacturing discipline than a finishing step. It’s easy to underplay that. It’s just a coating, after all. But across sectors where obsolescence cycles are long and replacement is expensive, or simply not an option at all, longevity becomes a design requirement in its own right.
In reality, longevity usually isn’t about just one thing going wrong. Land systems make that clear quickly. Shock and vibration are constant, yes, but they’re almost the obvious ones. Moisture, condensation, dust ingress, temperature cycling, those are the quieter contributors. Layer them together over time and the picture shifts.
“People tend to isolate environmental factors,” says Ernest Garcia, General Manager. “But systems don’t experience them in isolation. It’s cumulative exposure that drives degradation.”
It shows up in small ways first. Leakage currents. Corrosion beginning at component edges. Intermittent behaviour that disappears under test conditions and reappears in the field. None of it catastrophic, at least not immediately. But it chips away at reliability, and over extended service lives, ten, fifteen years in some defence programmes, that starts to matter more than most headline specifications.
Traditional protection methods still have their place. Enclosures, seals, gasketing, they keep out the worst of the external environment. What they don’t do is protect the surface of the electronics themselves, where condensation forms and residues remain active. Fine-pitch assemblies, increasingly common, are particularly exposed. That’s the gap conformal coating is intended to address.
Advanced Coating’s focus on Parylene pushes that further. The material itself, applied via chemical vapour deposition, forms a uniform, pinhole-free barrier over complex geometries, without the inconsistencies that can come with liquid coatings. No pooling, no shadowing. Just coverage.
More to the point, it’s controlled. Thickness can be held within tight tolerances, which sounds like a manufacturing detail but isn’t trivial. In dense or high-voltage electronics, excess material can interfere with performance just as easily as insufficient coverage leaves vulnerabilities. Precision becomes part of the reliability equation.
“The advantage for us is repeatability,” Garcia continues. “We can apply the same level of protection across different assemblies and platforms without introducing variability. That’s critical when you’re dealing with Class 3 electronics.”
That reference, IPC Class 3, isn’t incidental. It underpins much of the company’s work across defence, aerospace and medical sectors, where failure isn’t just inconvenient. Cleanliness, process control, inspection, these are the foundations. Coating sits on top of that, not as a fix, but as reinforcement.
It also intersects with a broader shift in the market. Electronics are becoming denser, more complex, and expected to operate in increasingly hostile environments. Aerospace systems, UAVs, industrial controls, even medical devices, all demand high reliability under conditions that would have been considered edge cases not long ago. The conformal coatings market reflects that pressure, with demand growing alongside the need to protect miniaturised, high-performance electronics.
Competition in this space is not light. Established players bring scale and some R&D capability. Advanced Coating’s position is different. More specialised. Focused on application-specific solutions, particularly where geometry, substrate sensitivity or environmental exposure push standard approaches beyond their limits.
And then there’s the practical side of things, which engineers tend to appreciate once they’ve been through it. Masking. Rework. Access points. It sounds mundane, but it isn’t really. Poor masking alone can undermine an otherwise sound coating process, leading to bridging, contamination or functional issues post-application. It’s one of those areas that often gets less attention than it probably should.
“Coating isn’t something you bolt on at the end,” Garcia smiles and says. “If you don’t consider it early, design, materials, interfaces, and all of the rest, you create problems that are harder to solve later.”
That early consideration links directly to obsolescence, though it’s not always framed that way. In long-life platforms, where electronics may need to remain operational well beyond their original design window, protecting against gradual degradation becomes a way of extending usable life. Not indefinitely, of course. But enough to reduce maintenance cycles, avoid unnecessary replacement, and keep systems in service longer than they might otherwise manage.
Which brings it back, in a slightly roundabout way, to that original phrase, it passed test. It still matters. But increasingly, it’s only the starting point. The real question is what happens next, after the environment has had time to do its worst.
Some systems start to drift, others don’t. More often than not, the difference comes down to a layer you can barely see. So the question isn’t whether a system passed the test, it’s whether it’s built to keep performing, year after year, in the environments it actually has to survive. At Advanced Coating, that’s exactly what we prepare for.
