Custom Shape Plastic Extrusions
With more than 40 years of experience and as a dedicated custom plastic extrusions manufacturer, SeaGate Plastics provides complete support throughout the process. Our team works closely with clients from concept through tooling and production. SeaGate’s Waterville location ISO 9001:2015 certified processes, in-house tooling, and fast turnaround make it a reliable choice for custom profile development.
SeaGate Plastics manufactures custom plastic extrusions developed to meet specific dimensional, material, and performance needs. These extrusions are produced through a continuous process, forming plastic into consistent cross-sectional profiles. Custom profiles allow for improved function, better fit, and alignment with different application requirements across manufacturing, construction, and packaging industries.
Ready to get started? Contact us now to discuss your custom plastic needs with one of our pros.
Why Choose Custom Plastic Extrusions?
Custom plastic extrusions offer a practical alternative to standard components. They provide greater design flexibility, allowing engineers and manufacturers to achieve ideal part integration. Whether the focus is on reducing assembly time, improving aesthetics, or matching performance needs, custom extrusions support better outcomes. Applications include window tracks, sealing strips, tubing, display components, and protective edges. These extrusions are often used in industries that require consistent dimensional accuracy and repeatability.
Materials Available for Custom Plastic Extrusions
Material selection is a critical part of extrusion design. SeaGate offers a broad range of thermoplastics such as ABS, HDPE, HIPS, PVC, and polypropylene. These materials can be customized with additives for UV resistance, color-matching, flame retardance, or chemical resistance. Material choice is guided by project requirements including indoor or outdoor use, load-bearing needs, and appearance.
Capabilities in Plastic Co-Extrusion
SeaGate Plastics also provides plastic co-extrusion capabilities. This process combines two or more materials in a single extrusion, offering both structural and aesthetic advantages. For example, a rigid base can be combined with a flexible seal, or a multi-color profile can be created for branding purposes. Co-extrusion is commonly used for window seals, multi-functional strips, and dual-hardness profiles where different performance characteristics are needed within one part.
Tooling and Design Support for Custom Shapes
SeaGate offers in-house die and tooling fabrication, allowing greater speed and control over new projects. Whether the profile involves solid, hollow, or multi-void shapes, the design process is guided by performance goals and dimensional targets. The team can accommodate dual-durometer requirements and develop tooling to support co-extrusion or complex geometries. Prototyping and sample runs are available to confirm design integrity before full production.
Plastic Co Extrusion Capabilities:
SeaGate Plastics uses plastic co-extrusion to produce stock and custom profiles that combine multiple materials or colors in a single part. Co-extrusion allows one layer to provide strength and rigidity, while another layer adds flexibility, grip, or sealing.
This process is used in many edge trims, seals, and dual-durometer products. For example, a co-extruded U-channel might include a rigid core and a soft gripping surface. While many co-extruded parts are developed through custom programs, several standard shapes that include co-extruded features are available for bulk purchase.
Plastic co-extrusion is particularly useful when combining functional needs without resorting to assembly. It supports applications in automotive interiors, retail point-of-purchase displays, and specialty packaging.
Tolerances, Dimensions, and Technical Specifications
Our custom plastic extrusions are manufactured with precision and repeatability. Wall thicknesses range from 0.030 inches to 0.375 inches, with widths and shapes matched to customer requirements. We offer post-processing services such as CNC routing, cutting, drilling, punching, and packaging to reduce downstream labor and shorten lead times for integration.
Request a Quote / Get Started
Starting a project with SeaGate Plastics is simple. Customers can submit CAD files, part drawings, or concept sketches to begin the quoting process. We’ll evaluate material needs, profile requirements, and volume expectations to provide fast, accurate feedback. SeaGate supports both low-volume development and high-volume production with flexible scheduling and on-time delivery. For more information, please feel free to contact us.
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