Rubber plugs are used in a wide variety of applications. Also known as rubber caps or rubber hole plugs, they are perfect to cover holes in a variety of objects. Rubber hole plugs are used for sealing components. Rubber caps and rubber plugs are specially designed to be used for applications requiring resistance to heat and chemicals. Available in various shapes and sizes, they can be custome made as well to fit wherever they are needed. The rubber plugs are ideal for masking or covering parts during high temperature powder coating processes as well as medical applications where sterilization is needed.

Types of rubber used in rubber plugs

• Silicone Rubber
• EPDM Rubber

While silicone rubber plugs are typically reserved for high temperature paint masking applications, the EPDM rubber plugs are inexpensive rubber hole plugs that can be used for a wide variety of applications.

Uses of Rubber Hole Plugs
Rubber plugs are used in packaging, paint masking, thread protection applications. They are suitable for appliances, vehicle, furniture, cabinets, shelf, closet organizers, point of purchase (POP) displays, store fixtures, shutters, vinyl fences etc. besides being used to cover high temperature, chemicals filled bottles or objects.

Properties of Rubber Plugs

• They can resist very high temperatures, up to 600º F while maintaining their pliable, conforming nature.
• Resistant to harsh chemicals.
• Ideal to be used in anodizing and plating.
• Excellent for any application requiring a durable closure that can provide a very tight seal.
• Also functions well as a noise insulator or inhibitor.

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Types of Rubber Plugs

• Rubber Flange Caps: This is a type of cap or plug, the design of which simplifies the application and removal of the cap. There is an internal lip on the open end that provides a positive seal to prevent any contaminants from seeping onto the part. A flanged head enables the cap or the plug to be manually removed with ease.
• Plus Plugs: The plus rubber plugs, with their unique 360° pull tab design, are easy to install.
• T-Plugs: The T-plugs come in a wide variety of sizes and offer a cost effective solution for many applications.
• Side Pull Plugs: These are rubber T-plugs with pull tabs.
• Electrical Connector Plugs: This is another rubber plug designed specifically for electrical connectors.
• Threaded Plugs: Threaded plugs are rubber plugs with screw hole designed for use on flared fittings.
• Pull Plugs: They are rubber plugs used for sealing both ends of a through hole.
• Washer Plugs: These not only act as rubber hole plugs, but also mask the area surrounding the hole.

Vinyl “Rubber” Caps and Plugs
Although vinyl is technically a plastic material, many people refer to vinyl plugs as rubber caps or rubber plugs. In many ways, both vinyl and rubber are very similar. Both provide airtight seals and extremely flexible. They insulate. They also provide a significant level of cushion to the product that they are protecting. However, vinyl materials cannot resist the high temperature used in many powder coating curing process which is not the case in rubber materials. High temperature resistant vinyl plugs or caps perform admirably in most paint curing systems. Vinyl and rubber closures come in a wide variety of vibrant colors, shapes and sixes.