Plastic Contract Manufacturing Malaysia for Hardware and Custom Parts

Sin Yang Plastic is an end-to-end plastic company in Kajang, Selangor. We take a concept through prototype, tooling, production, finishing and delivery, so you deal with one team for the whole project.

Full-Service Plastic Company for Every Project Stage

Our contract service starts with your idea and ends with packed, inspected goods. Brands that need their own tooling can also review our OEM manufacturer Malaysia page for the full process.

Focused on Plastic Hardware Demand

We design our own range around what the market buys, including taps, valves and the best-selling 2 way tap connector. That experience carries over to client projects, because we already know how hardware performs in daily use.

Prototype and Custom Mould Building

Prototype Construction

Our experienced toolmakers work with you to define the concept and build a prototype you can test.

Custom Mould Building and Troubleshooting

We build your custom mould in house and can troubleshoot existing moulds when output quality drops.

Injection Moulding Capacity

19 injection machines

up to 560 tons

Two manufacturing plants

and a warehouse

Insert moulding

and gas-assisted injection moulding

In-house testing facility

for quality checks

How Our Contract Manufacturing Works

1. Brief and Quote

Share your specification, drawing or sample. We confirm lead time, quantity and price.

2. Prototype and Tooling

We build the prototype, then the production mould.

3. Production and Quality Control

Moulding, secondary operations and inspection run under one roof.

4. Delivery and Aftercare

We pack and ship your order, and support reorders and mould maintenance.

Talk to Our Manufacturing Team

Send your requirements and we will recommend the right process, material and timeline.