Standard silicone masking caps cover the most common stud and pin diameters, but production components often feature non-standard profiles, irregular cross-sections, or close-tolerance fits that catalogue sizes cannot reliably seal. An imprecise cap fit leads to powder ingress under the cap, cap displacement during the coating process, or residue on critical mating surfaces after removal.

Our custom silicone masking caps are moulded to your exact component 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 caps are produced with a smooth inner surface to ensure consistent sealing against the masked component. For applications involving threaded studs or bolts, custom threaded silicone caps are available to provide a watertight seal and protect thread flanks during coating.

Key properties and configurations:

• High-temperature rated: our custom silicone masking caps withstand 250°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, retention force, and sealing performance
• Any geometry: custom silicone caps are available in virtually any shape, including round, square, hexagonal, flanged, 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 caps 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 cap exists

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