Products · ELPEGUARD®

Conformal Coatings

ELPEGUARD® conformal coatings are used to protect and insulate assembled PCBs so they can meet higher requirements for reliability and service life.

A conformal coating is a thin polymer film applied over a populated board, following the contours of the PCB and its components. That film insulates the conductors and shields the assembly from moisture, dust, condensation, salt spray and chemical attack, which are the conditions that shorten the service life of electronics once they leave the factory.

The ELPEGUARD® range spans acrylic, polyurethane, silicone, thick-film curing and water-based aqua systems, so the coating can be matched to the job rather than the other way round. Which one suits depends on the temperature range the board will see, the chemicals it will meet, whether the assembly has to be reworked later, and whether your line is set up for solvent or water-based chemistry.

Acrylic

Fast-drying acrylic coatings offering easy rework and reliable moisture protection.

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Acrylic

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Acrylic

Acrylic coatings dry fast and rework easily, which is why they are the usual starting point for general-purpose PCB protection. The film gives reliable protection against moisture and contamination, and because it dissolves readily it can be removed over a single joint for repair without disturbing the rest of the board — a real advantage on assemblies that are expected to be serviced.

  • Fast drying, so boards move through the line quickly
  • The easiest of the ELPEGUARD systems to rework and repair
  • Reliable moisture and contamination protection for general use
  • Well suited to high-volume production and serviceable assemblies
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Polyurethane

Tough polyurethane coatings with excellent chemical and abrasion resistance.

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Polyurethane

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Polyurethane

Polyurethane coatings are chosen when the board will meet something harsher than damp air. The cured film resists solvents, fuels and abrasion far better than an acrylic, holding up where boards are exposed to chemicals in service or to handling that would scuff a softer coating. The trade-off is that rework is more demanding, so they suit assemblies not expected to be opened up again.

  • Strong resistance to solvents, fuels and chemical attack
  • Hard-wearing film that resists abrasion and handling damage
  • Suited to automotive, industrial and harsh-environment boards
  • Harder to rework than acrylic — best where repair is unlikely
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Silicon

Silicone coatings for high-temperature stability and flexible protection.

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Silicon

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Silicon

Silicone coatings stay flexible across a very wide temperature range, which makes them the answer for boards that run hot or cycle repeatedly between extremes. Because the film moves with the assembly instead of resisting it, thermal expansion does not crack the coating or stress solder joints, and the coating keeps insulating on high-temperature and high-voltage assemblies.

  • Stable across a wide high- and low-temperature range
  • Stays flexible, so thermal cycling does not crack the film
  • Good choice for power, LED and high-voltage assemblies
  • Protects without stressing joints on boards that expand and contract
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Thick-Film Lacquers

Thick-film curing systems for demanding insulation requirements.

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Thick-Film Lacquers

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Thick-Film Lacquers

Thick-film lacquers lay down a substantially heavier film than a standard conformal coating, which is what demanding insulation requirements call for. The extra build gives greater dielectric strength and a more robust barrier over conductors and component edges, and the UV-curing grades reach full cure in seconds under a UV source rather than waiting on an oven.

  • Heavier film build for demanding insulation requirements
  • Greater dielectric strength over conductors and component edges
  • UV-curing grades cure in seconds for fast line throughput
  • Applied selectively where the higher build is actually needed
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Aqua

Water-based, low-VOC coatings for environmentally conscious production.

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Aqua

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Aqua

Aqua coatings are water-based, so they carry a fraction of the solvent of a conventional system. That cuts VOC emissions and the handling, storage and extraction burden that comes with solvents, without giving up the protective film — the practical route for plants working to tighter environmental limits or trying to improve conditions on the shop floor.

  • Water-based chemistry with substantially lower VOC content
  • Reduced solvent handling, storage and extraction requirements
  • Better working conditions around the coating area
  • Protective performance retained for general PCB coating
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