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Your go-to source for custom, high-quality injection molding, since 1976
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Get a single partner to handle everything, from design to delivery, so you can order parts for any-sized project with confidence.
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Custom Injection Moulding Services
Material Sourcing & Expertise
Custom Part & Mould Design
Warehouse & Shipping
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Onboarding & Consulting
Cut lead times
Save money
Reduce errors
Increase efficiency
No more juggling suppliers.

Work with an injection moulding supplier that turns challenges into results.

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Curious about how we can help you?
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Improve Quality

Get consistent performance with defect-free parts, rigorous QA processes, and expert craftsmanship tailored to your specifications.

Reduce Costs

Control expenses with competitive pricing, efficient processes, and expert material sourcing that minimizes waste without compromising quality.

Increase Efficiency

Optimize output with state-of-the-art machinery, expert guidance, and a team dedicated to minimizing downtime and improving workflows.

Reduce Risk

Rely on rigorous quality control and defect-free production to protect your business from costly disruptions.

Meet Deadlines

Stay on schedule with fast turnarounds, 24-hour operations, and reliable shipping solutions designed to meet your timelines.

Achieve Sustainability Goals

Use eco-friendly PCR materials and energy-efficient manufacturing to reduce your environmental footprint while meeting customer expectations.

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Custom Injection Molding Services

View All Custom Injection Moulding Services
From idea to delivery

Handle every step of production with a partner committed to your success.

Easy Onboarding

Start with confidence. Our streamlined onboarding process ensures smooth transitions, clear communication, and dedicated support to get your production up and running quickly.

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Material Sourcing & Expertise

Access high-quality materials, including PCR and specialty resins, with competitive pricing and expert guidance to meet your specific needs and sustainability goals.

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Custom Part & Mould Design

From concept to production, we guide you through design, prototyping, and tooling to create moulds that perform flawlessly and fit your product’s needs.

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Custom Injection Moulding

Get precision-made, high-quality parts delivered on time. Our versatile machines handle parts of any size, ensuring efficient, consistent results for every project.

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Packaging

Protect your products with custom packaging solutions, from heat-sealed bags to shrink wrapping, all designed to enhance presentation and simplify logistics.

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Warehousing & Shipping

Store inventory securely and ship products efficiently. We handle cross-border logistics, inventory management, and fast delivery to keep your supply chain moving.

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Strategtically located on both sides of the border to better serve you

We are located between Toronto, Ontario and Buffalo, New York, which helps make us an ideal partner to support all your manufacturing, packaging and shipping needs!

Faster Shipping Times

Get your products delivered quickly within North America, thanks to our locations near Toronto, Ontario, and Buffalo, NY.

Lower Logistics Costs

Save on expensive international logistics fees with efficient cross-border shipping that cuts costs for Canadian and U.S. businesses.

Easy Cross-Border Fulfillment

We handle all customs paperwork and shipping logistics, making cross-border fulfillment hassle-free for your business.

Access to Canadian and U.S. Markets

Serve customers in both countries easily with flexible shipping options on both sides of the border. We’ll ship from the best location to keep delivery times and costs low.

Flexible Warehousing Options

With a 30,000 ft² facility in Toronto, Canada, and a warehouse in Buffalo, NY, you can store, manage, and ship your inventory quickly and easily on both sides of the border.

Customized Delivery Services

We use our own truck for tailored business-to-business deliveries, giving you control over how and where your products are shipped.
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Who we are.

We are Peninsula Plastics

A family-owned business dedicated to making your job easier for 45+ years.

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Machine Versatility

Produce parts of any size, from dime-sized components to 32-gallon bins with precision.

Proven Track Record
45+ years delivering high-quality, custom parts of any size to North American manufacturers.
Mold Maintenance Expertise
Prevent downtime and extend mold life with expert maintenance and proactive care for all tooling.
Fast, Reliable Turnaround
Our strategic locations, 24-hour operations, and cross-border logistics keep your production on track.
Commitment to Quality
Our rigorous QA process delivers defect-free parts that meet your exact specifications, batch after batch.
Partnership Approach
We solve problems, offer proactive communication, and work as an extension of your team.
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craig-bolton
In memory of our late president, Craig Bolton
We hope we’re making you proud.
Award
Proud to be named “Supplier of the Year” from a major Canadian Sports Distributor
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Discover how we stay committed to our mission of environmental responsibility.
Design & Prototyping
Packaging
Warehousing
Delivery

Your all-in-one partner for injection moulding

Simplify your supply chain with a single partner handling every step of your custom plastic injection moulding process.
Step One

Get in touch

To discuss your project needs & sustainability goals.
Step Two

Get a custom plan

That simplifies your entire supply chain, eliminating the need for multiple vendors
Step Three

Order confidently

Knowing your parts will be delivered on time, to your exact specs, & with minimal environmental impact
Testimonials
Peninsula Plastics has been a great find and start to our new patent pending product development and launch. From early on input to important mold design considerations, engineering input, mold maker coordination, testing and then to actual production start, preparation for logistics, eg. labeling, barcodes, bagging and carton packaging, palletizing and delivery has been incredibly professional and supportive / helpful. Has been a great partner and highly recommended.”
Fred N. President, Owner & Product Inventor at a Water Drainage Company
Our experience working with Peninsula Plastics has always been positive. Our orders are always completed in a timely and professional manner and we never have to worry that there will be delays or quality issues. Peninsula Plastics is known for being competent and efficient, and are always very quick to handle anything we throw at them. We enjoy working with the team and look forward to maintaining a business relationship with them for years to come!
Nichole L. Supply Chain Supervisor in the Sport Products Industry
Peninsula Plastic is a trusted supplier for our business. Peninsula is a great family owned company that goes above and beyond for their customers.
Nick C. Vice President of Strategic Sourcing in the LPG Cylinder & Tank Refurbishment Industry
With a partnership built upon mutual respect and collaboration, we have come to depend upon Peninsula Plastics to meet the ever-changing needs of our customers. We appreciate their responsiveness to our business and value them as a dependable, Canadian supplier who offers solutions that improve our products. It’s always reassuring when you meet another distributor who is quick to refer to a supplier they use, only to find out it is Peninsula Plastics.
Matthew S. Business Analyst at a Sports Distributor

Choose PenPlast.

Build with confidence.

ChoosePenPlast.

Build with confidence.

Make your next project a success.
Get in Touch