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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.
BES Series - Black EPDM Stoppers
Tapered design to fit a variety of hole diameters.
Bore-Tite™(CBP)
EPSI’s Bore-Tite™(CBP) is a perfect alternative to using an STS (stopper) and SPP (pull plug) together. It comes in most common standard nominal English and metric counterbore sizes. This product makes for easy installation and removal using handle.
BTM Series - Blind-Hole Thread Mask Plug
Shallow Design is Ideal for Blind Hole Applications
C-BTM Series - Caterpillar Blind-Hole Thread Mask-Plug
Shallow Blind Hole Plugs Designed for Caterpillar
CPP Series - Flex-Tite™ Pull Plugs
The best way to mask 82° / 90° / 100° countersink holes
DFP Series Weld-Tite™ Dual Flanged Push Plug
Dual flanged pull plug used during powder coating, e-coating, anodzing and plating where access to the tag is limited or blind.
DWP Series - Double Washer Pull Plugs
Masks entry and exit threads simultaneously
EPP Series - EDPM Pull Plugs
Used as a plug for non-threaded and threaded through-holes. High-temperature EPDM formulation is extremely chemically resistant and economical.
FLPE Series - EPDM Flangless Plugs
Tapered ribs and hollow core allow for masking of multiple sizes of holes.
FLPS Series - Silicone Flangless Plugs
Tapered ribs and hollow core allow for masking of multiple sizes of holes.
GWPP Series - Gum Silicone Weld-Nut Pull Plugs
Gum silicone version of our Weld-Nut Pull Plug. Specifically engineered to tackle the tough requirements of masking off the lead-in chamfer of threaded applications.
HSPP - Hollow Silicone Pull Plugs
Industry standard solution for threaded and non-threaded through-holes in powder coating and e-coating applications.
HSTS Series - Hollow Stoppers
Hollow design reduces material and shipping costs.
HTP Hang-Tite™ - Hanging Threaded Plug
The Hang-Tite Plug (HTP) serves the function of a plug and a hanging tab. It is especially favorable for powder coating, but optimal for all immersion processes. The metal core allows conductivity for powder coating.
SMS Series - Silicone Masking Stopper
Easily combines with custom-designed parts for one or both ends.
SMT/EMT Series - Silicone & EPDM Mousetail Plugs
Typically used to plug extremely small holes, especially in electronic components.