Standard silicone masking plugs cover the most common geometries, but production components often require a precise fit that catalogue sizes cannot reliably deliver. An imprecise fit leads to coating bleed, plug displacement under process pressure, or surface contamination after removal.

Our custom silicone masking plugs are moulded to your exact geometry, designed for controlled compression, secure retention through the full powder coating cure cycle, and clean removal without tooling or residue on critical surfaces.

All custom plugs are produced with a smooth outer surface to ensure consistent sealing against the masked surface. For applications involving threaded openings, custom threaded silicone plugs are available to provide a watertight seal and protect lead-in thread chamfers during coating.

Key properties and configurations:

• High-temperature rated: our custom silicone masking plugs withstand 250 degrees C and above, making them suitable for all standard powder coating cure cycles including high-temperature ovens
• Customisable hardness: silicone Shore hardness is selectable to match your required compression fit, insertion force, and sealing performance
• Any geometry: custom silicone plugs are available in virtually any shape, including tapered, straight, flanged, pull-through, threaded, and complex non-standard profiles
• Reusable and durable: high-quality silicone construction allows repeated use across multiple powder coating cycles without loss of fit or sealing performance
• Colour-coded to specification: custom plugs can be supplied in any silicone colour to support operator identification and process control in production environments
• Economical for small series: custom tooling and production is viable even for smaller quantities where no suitable standard masking plug exists

Lead time is typically 3 to 4 weeks from approved geometry.