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As a leading rotomoulding company in New Zealand we excel with advanced techniques, exceptional products, and extensive assembly work for various other companies.

Design, production & assembly
OUR SERVICES
Design, production & assembly

Creating our own products or bringing your ideas and concepts to life. We specialise in collaborative concept development and design, quality tailored production and professional assembly.

What we offer
20 Plus Years
OUR STORY
20 Plus Years

Our experienced team have been assisting customers with design and manufacturing solutions for over 22 years. We have the experience, the customer focus and can-do attitude to bring your product to market every time.

Learn more
Continuous Improvement

Our Commitment

Lean Manufacturing
Lean Manufacturing

Using lean manufacturing principles we improve efficiency, increase productivity and reduce waste. Leading to a smaller manufacturing footprint, increased sustainability and enhanced customer experience.

Northland Business Excellence
Northland Business Excellence

On our path of continuous improvement we entered and won the Large Business Category of the Northland Business Excellence Award in 2023. A proud moment for the whole team

SIRI Framework Assessment by Becker
SIRI Framework Assessment by Becker

In 2024 we invested in an assessment of our business capabilities. We were scored on a range of criteria to compare Portstar to a global index based on scores by other New Zealand and international manufacturing companies. This process has assisted us to prioritise the development of smarter in-house processes.

TESTIMONIALS

What our customers say

“Our organisation has been using Aids to Navigation supplied by Portstar Plastics for the last 10 years.

The company are easy to deal with and are able to develop and customise equipment for your individual requirements or customise a piece for a special location or project. We have always found the product to be reliable, durable and delivered on time to meet our deadlines. We look forward to continuing our relationship and continued use of these products in the future.”

Northland Regional CouncilMaritime Manager
"Portstar has been an integral part of our business for almost 20 years and over that time our demand on them has steadily increased.

We value the input Portstar has given us with regard to the impact our designs will have on mould making and product manufacturing times. Portstar understand the unique demands of our business and are willing to assist wherever they can. The product quality and dedicated deliveries to our warehouse in East Tamaki make getting product to market that much easier. We appreciate the working relationship we have with Mark and the team and look forward to many more years working together."

Transnet NZ Ltd Operations Manager
“Portstar have been one of our key suppliers for many years.

Over the years we have worked closely together, including having Portstar's input into our R&D program as we have developed and improved our products. Portstar's communication and service is very good which is very essential in maintaining a great long-term working relationship. The team have always been flexible with production, so we have the product we need to meet our outgoing orders.”

Waterflow NZ LTDHead of Operations
“Our Company has been dealing with Portstar Plastics now for many years and find them a very valuable supplier to our company.

Mark and his team are great to deal with and willing to help wherever they can. This includes extra effort to meet deadlines and advise on designing and mould making requirements. We appreciate our working relationship with Portstar as we continue forward and would be very glad to recommend them for any rotomoulding requirements.”

Ag-Tech Industries LtdManager
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AWARDED BUSINESS

Large Business Award Winner – 2023

"Portstar Plastics Ltd is based in Ruawai, producing rotational moulding plastic parts for a range of industries including electrical, wastewater, agricultural, marine and retail.

This family owned and operated business employs 15 staff and impressed the judges with the level of staff involvement in the judging process as well as all levels of business operation. This dedicated team along with the adoption of LEAN processes has seen a dramatic increase in productivity in challenging times in the industry."

Large Business Award Winner – 2023