Dip Molded Plastics banner

Plastic Plugs

A reliable source for Dip Molded Plastic information and leading Dip Molded Plastic Companies & Manufacturers.

Plastic plugs can be formed in different ways such as injection form molding, or blow molding, but one of the most common methods of manufacturing plastic plugs is through the process of dip molding. Plastic dip molders form a mold or mandrel in a hollow version of the shape they desire. Read Moreā€¦

Plastic Plugs Plastic plugs are used to seal or block the openings of tubes, pipes, fittings and connectors in order to prevent flow of materials past a certain point in either direction, and to protect against unwanted contaminants such as dirt and moisture. They can also be used for marking protection during finishing processes such as painting or coating.
Request for Quote

Leading Manufacturers

Sellersville, PA  |  800-398-2520

We are plastic experts, and we offer many services for our customers, including dip molding and a whole lot more. No matter who our customers are, we will work our hardest to ensure that you are fully satisfied with our products.

Request A Quote

Molded Devices, Inc. Sellersville $$$

Medway, MA  |  508-533-6101

Innovative Coatings is a manufacturer of plastisol dip molding and fluidized bed powder coatings of epoxy, polyolefins, nylon and vinyl. Our dip coatings are of FDA-approved and biomedical grades.

Request A Quote

Innovative Coatings, Inc. $$$

San Antonio, TX  |  508-533-6101

Texas Dip Molding & Coating is known for our high quality custom coating that maximizes strength, hardness, flexibility and durability for parts designed and manufactured in any application.

Request A Quote

Texas Dip Molding & Coating, Inc. $$$

Waterbury, CT  |  203-805-4564

Precision Dip Coating provides dip coating services for the manufacture of soft plastic parts such as cap plugs. hand grips, and more. Decorative and protective, our services are very cost effective and we have a proven track record for on time delivery and precise manufacturing. We can match any color you need, and offer services such as assembly, die cutting, packaging, and decorating.

Request A Quote

Precision Dip Coating LLC $$$

New Carlisle, OH  |  937-845-9411

Carlisle Plastics is a dip molding plastics manufacturer offering end caps, plastisol paint masks, thread protectors, tube closures, protective caps and decorative caps.

Request A Quote

Carlisle Plastics Company, Inc. $$$

Auburn Hills, MI  |  800-482-1842

Rubber & Plastics Company has 50 years of experience in manufacturing dip molding with the materials, equipment and flexibility to rapidly prototype. We provide standard and custom designed high-temp paint masks, caps, grips and plugs.

Request A Quote

Rubber & Plastics Company $$$
placeholder image Molded Devices, Inc. Sellersville Innovative Coatings, Inc. Texas Dip Molding & Coating, Inc. Precision Dip Coating LLC Carlisle Plastics Company, Inc. Rubber & Plastics Company

This mold is then dipped into a container of molten polymer, usually a material such as PVC pr plastisol which has been heated to its ideal viscosity. Once the mold has reached its desired dwell time in the plastic, it is slowly removed and the plastic coating is left to harden. Depending on the polymer used, the covered mold can be heat treated to further achieve the desired finish. Used by industries such as automotive, finishing, food services and HVAC, plastic plugs and plastic caps are a common stock item and as tubes, pipes and fittings often come in standard sizes, it is possible to source plugs to fit those sizes from warehouse suppliers.

Carlisle Plastics Round PVC Caps Plastic Plugs - Carlisle Plastics Company

Common types of plugs include round, square or rectangular, but they can be manufactured in custom shapes too. By adjusting liquid temperature, dip speeds and times and withdraw speeds, manufacturers can design plugs with varying color, texture, wall thickness, material hardness and length. Tapered plugs can fit into a number of openings and still provide a satisfactory seal. As plugs are often used to provide seals, it is important that they fit correctly, especially in the case of a waterproof or airtight seal and so high precision is required.

Plugs can be molded to be flush fit when they are used to fill a hole in a piece of metal sheeting or a hole in the side of an automobile under construction for which a smooth surface is required. Other plugs that are used on a temporary basis can be constructed with pull tabs for easy removal. Square plugs click into place, and grooved plugs grip tightly to the interior of the opening ensuring a secure fit.

For each of these plugs, automated machines can perform most of the dip molding process, allowing labor costs to be relatively low. Each plastic plug takes only a few minutes to manufacture from start to finish, and dip molded objects rarely require secondary finishing. Therefore, high quantities of plugs are able to be produced in fast turnaround times.

Plastic Plug Informational Video