Masking Plugs

High-performance masking plugs designed to protect threaded holes, through-holes,
and blind holes during powder coating, e-coating, anodizing, and painting processes.
Our silicone and EPDM plugs withstand temperatures up to 500°F (260°C), ensuring
no coating penetration. Available in tapered, pull-tab, and flanged designs to fit
metric and imperial hole sizes from M2 to 2″ diameter.

  • Silicone pull plugs for powder coating masking through holes

    High Temp Silicone Pull Plugs (Pull-Through Masking) – Up to 315°C

    Leader Masking Silicone Pull Plugs are designed for masking through-holes and threaded bores. The long handle allows the operator to easily pull the plug through the hole, creating a tight seal on both ends.

    • Material: High-Grade Silicone (600°F / 315°C)

    • Design: Tapered body with a pull-tab handle

    • Application: Ideal for masking the leading thread chamfer

    • Efficiency: Faster insertion and removal than standard plugs

  • High temperature silicone tapered plugs kit for powder coating masking

    High Temp Silicone Pull Plugs for Powder Coating & Plating

    Leader Masking Tapered Plugs are the industry standard for masking holes during Powder Coating, E-Coating, Anodizing, and Plating.

    Made from high-grade silicone, these plugs can withstand temperatures up to 600°F (315°C) without melting or hardening. The tapered design allows one plug to fit a range of hole sizes, ensuring a tight leak-proof seal.

    • Material: 100% High-Temp Silicone

    • Temp Resistance: 315°C / 600°F

    • Color: Color-coded by size (Custom colors available)

    • Application: Threaded and non-threaded holes

  • Silicone T-plugs with flange for grounding masking

    High Temp Silicone T-Plugs (Washer Plugs) – For Grounding & Masking

    Leader Masking Silicone T-Plugs feature a solid body with a wide flange (washer) on top. This dual-action design masks the hole while simultaneously creating a circular clean area around the opening for electrical grounding (earthing).

    • Design: T-Shape with Integrated Flange

    • Function: Masks hole + Creates grounding ring

    • Temp: Up to 315°C (600°F)

    • Feature: Cannot be pushed all the way through

  • Silicone threaded masking plugs

    High Temp Silicone Threaded Plugs for E-Coating & Powder Coating

    Leader Masking Silicone Threaded Plugs are designed to screw directly into threaded holes, providing a positive mechanical lock. Unlike tapered plugs, they will not pop out under pressure during E-Coating, liquid painting, or sandblasting.

    • Material: High-Grade Silicone (600°F / 315°C)

    • Design: Flanged head for easy installation & removal

    • Feature: Positive sealing for threaded holes (Metric, BSP, UNF)

    • Best For: E-Coating tanks & pressurized washing