Precision plastic injection molding is at the core of what we do. At Westec, every program is built around precision, process control, and efficient production from tooling through manufacturing.
By combining advanced tooling technologies, in-house expertise, and a flexible production model, we support programs that require tight tolerances, multi-material designs, and consistent performance at scale.
Westec combines advanced tooling, flexible manufacturing strategies, and in-house capabilities to support faster, more reliable production. Backed by hands-on experience, we reduce delays, improve efficiency, and help your program scale faster without compromising quality.
As an ISO 13485:2016 certified manufacturer, we understand what it takes to support regulated industries. From clean room manufacturing to DNA-free molding, our precision plastic injection molding processes are designed to meet strict requirements for quality, cleanliness, and consistency.
Precision molded cleanroom components for diagnostic, surgical, and patient-facing applications
Cleanroom-manufactured consumables, housings, and components requiring contamination control, DNA-free molding
Custom molded electronic components and enclosures requiring tight tolerances, including housings and connectors
High-performance structural, enclosure, and mission-critical components using engineering-grade materials
With roots in toolmaking, our team brings a deep understanding of how parts are designed, built, and produced. For programs where speed, precision, and performance are critical, our Mantle 3D technology is integrated directly into the tool room to produce high-performance steel cores and cavities.
These are not prototype tools, but production-ready solutions built from H13 steel, designed to reduce lead times to a matter of weeks while improving cooling, part performance, and overall efficiency. By combining additive manufacturing with traditional toolmaking, we can deliver tooling that supports faster timelines without compromising durability or long-term performance.
No matter your program goals, whether it is speed, cost efficiency, or scalability, our approach is designed to adapt. By combining in-house tooling for rapid response, domestic partners for complex builds, and offshore resources for cost-effective scaling, we provide a balanced solution tailored to your needs.
We also support customers looking to strengthen domestic supply chains and reduce reliance on offshore production. This allows you to optimize for speed, cost, and long-term scalability.
Quality is built into everything we do. From the first design review to final production, our team focuses on delivering consistent, repeatable results. This approach helps reduce variability, improve part performance, and ensure long-term reliability.
Founded in 1969, Westec Plastics is a privately owned precision plastic injection molding company based in the San Francisco Bay Area. Unlike traditional molders, we combine advanced tooling, flexible sourcing, and in-house manufacturing to support faster, more controlled production.
With roots in toolmaking, we work closely with customers to solve complex manufacturing challenges, improve efficiency, and deliver consistent results from development through full-scale production.
While many manufacturers have consolidated or moved operations, we have continued to invest in our capabilities in the San Francisco Bay Area and support our customers locally.
We work closely with customers across California, the West Coast, and beyond, including Nevada, Arizona, Oregon, and Washington, providing consistent communication, reliable production, and stronger, more resilient supply chains. Our team continues to focus on long-term success and building lasting partnerships.
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