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Masking Plugs
Masking Plugs for Finishing, Coating & Surface Protection
EPSI masking plugs are designed to protect holes, ports, threads, and critical internal surfaces during powder coating, e-coating, plating, anodizing, wet paint, blasting, and general processing. Whether your application requires high-temperature resistance, tapered fit, or dependable sealing during finishing, our plug solutions help support cleaner results, less rework, and more consistent part protection.
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Choose the Right Plug Type
High-Temperature Silicone Plugs
Ideal for powder coating, e-coating, plating, and other high-heat applications where reliable masking performance and repeat use are important.
Tapered Plugs
A versatile option for masking holes with varying diameters. Tapered designs help create a secure fit across a range of sizes and are commonly used in finishing operations.
Pull Plugs & Easy-Removal Styles
Designed for faster installation and removal, these styles can improve handling efficiency while helping maintain reliable masking coverage in demanding production environments.
Threaded & Specialty Plugs
For applications requiring more precise coverage, tighter retention, or specialized geometry, EPSI offers plug options built to support more complex masking and protection needs.
Common Applications
Powder Coating • E-Coating • Plating • Anodizing • Wet Paint • Blast Protection • Thread Masking • Port & Hole Protection
How to Select the Best Plug
- Application: Determine whether you need to protect holes, threads, ports, or internal sealing surfaces.
- Process: Match the plug to powder coat, e-coat, plating, anodizing, wet paint, blast, or general protection use.
- Temperature: Choose a material that performs reliably within your finishing environment.
- Fit: Confirm hole diameter, plug length, and taper requirements for secure masking coverage.
- Removal: Consider pull-style or easy-removal options when speed and repeat handling matter.
SOMS Series - Sink-O-Mask™ Plugs
Masking through-holes and surrounding washer area.
SPP Series - Silicone Pull Plugs
Industry standard solution for threaded and non-threaded through-holes in powder coating and e-coating applications.
STS Series - Silicone Tapered Stoppers
Tapered design to fit a variety of hole diameters.
TCP Series Pro-Tite™ Tapered Cap and Plug
Tapered polyethylene cap and plug used for protection from debris and contamination during handling and storage.
TIPS Series - Tube Insert Plugs
Especially well suited as a liquid tight seal when a large plug diameter is compressed into a small hole.
TNM Series - Thread-N-Mask Plugs
Excellent chemical resistance and self-tapping for liquid-tight seal.
TOPS Series - Shallow Tube Plugs
Creates Liquid Tight Seal for E-Coat and Plating Applications
TPP Series - Triple Push Plug
Will mask three hole sizes giving you cost savings.
TPSP Series Port-Tite™ Threaded Port Sealing Plugs
High-Density polyethylene threaded plug designed to provide a liquid tight seal that also protects ports from damage and contamination during shipping and handling.
WP Series - Washer Plugs
One plug can be used to plug two different hole diameters