Silicone Conformal Coatings — Pyra-Sil™

Silicone conformal coatings protect PCBs and electronic assemblies against moisture, condensation, humidity, fungal growth, chemical contamination, and thermal cycling. They seal component leads, solder joints, and PCB traces, preventing corrosion and electrical leakage in industrial, automotive, marine, and outdoor electronics applications.

Pyra-Sil™ silicone conformal coatings are one-part, moisture-cure systems. They self-level and reach a tack-free surface in 5 minutes at room temperature (or 25 seconds at 150°C), with full cure in 24 hours. No mixing, heat oven, or UV lamp is required.

Silicone conformal coatings offer a significantly wider service temperature range (−45°C to 260°C) than acrylic or urethane coatings. Silicone also maintains flexibility at low temperatures and resists high humidity, ozone, and UV degradation better than most organic coatings — making it the preferred choice for demanding outdoor and high-temperature electronics.

Pyra-Sil™ silicone conformal coatings are rated from −45°C to 260°C — one of the widest service temperature ranges available for conformal coatings, covering automotive under-hood, industrial power electronics, and outdoor communications equipment.

Yes. Pyra-Sil™ offers a fluorescent conformal coating grade that glows visibly under UV (blacklight) inspection, allowing QC verification of coverage uniformity and detection of missed areas on the coated PCB assembly.

Yes. Pyra-Sil™ silicone conformal coatings are compatible with manual brush application, dip coating, spray systems, selective coating machines, and automated time-pressure dispensers. Viscosity grades are available to match your preferred application method and line speed.