Our team will be delighted to help

Passionate about everything we do.

Our friendly and efficient team can help you turn your ideas into finished products within weeks or days - not months.

Michael Knight

Managing Director

Co-founder and Managing director of Donite Plastics. Michael is passionate about design and still gets involved with customers projects when time allows.


Stephen Kissick

Business Development Manager

With roots in engineering, Stephen focuses on development of the company, both internally with improvement initiatives and working with key clients to develop new business.


Patrick Knight

Engineering/R&D Manager

With background as a Development Engineer, Patrick has worked in a range of R & D projects and manufacturing efficiency. Quality comes naturally as the team works towards AS 9100.


Diarmuid Grant

Operations and Supply Chain Manager

Holding a degree in Engineering Management, Diarmuid worked with Hovis Bakery for 13 years gaining experience as a Process Improvement Manager, Assistant Manager, Supply Chain Manager and Manufacturing Manager and brings strong leadership, relationship building and management skills.


Simon Kyle

Quality Manager

Simon joins Donite Plastics with over 25 years engineering experience and is responsible for maintaining the quality of customer-facing and internal-processes for a range of vacuum-formed and CNC-machined plastic products, as well as communicating with suppliers to resolve quality concerns.



AS9100 Accreditation

Donite believes in a culture of continual development and continual improvement across all areas of the business. To this end Donite is independently audited to ensure it continues to meet the stringent requirements of the AS9100 accreditaion covering the Design, Manufacture and Assembly of Thermoformed Products.


AS9100 Accreditation

We aim to be a responsible and caring company, by reducing the carbon footprint of the products we make. Donite’s ethos is to supply a robust product with longevity; parts which can be reused time and time again. We are not a supplier of Single Use Plastics and ensure our offcuts and waste plastics are recycled. Reduction in the amount of waste going to landfill is vitally important. Donite specifies and uses material with recycled content when possible, and helps our customers to reduce their impact on the environment.

Experience and expertise with plastics

Donite Plastics specialize in the design and manufacture of custom moulded plastic parts using vacuum forming and other processes. These processes are ideal for large, medium or small batch quantities and even one-off prototypes. Donite is based about 5 miles south of Belfast - in Saintfield, County Down.

Donite prides itself in the comprehensive service that it offers. This includes full CAD/ CAM design and manufacturing facilities. Using 3D computer modelling and in-house mould making facilities they can turn ideas into production parts within weeks or days rather than months.

Facilities include full 5 axis machining and trimming as well as the largest Vacuum Forming Machine in Ireland. They have been an EN ISO 9001 quality assured company since 1997. Their processes and systems are continually being developed and improved.

Donite Plastics has worked with some of the UK's leading manufacturing companies and has built strong relationships with them by continually striving to exceed their expectations.

Year A brief history of Donite
1981 Best friends Richard Donaldson and Michael Knight began to design & manufacture motorcycle fairings in a small workshop above Michael's parents' garage. Donaldson and Knight began trading as Donite Plastics. The company evolved from making motorcycle and car accessories into custom moulded GRP parts - architectural canopies/panels, engineering equipment covers, tanks, etc.
1990 Donite bought its first vacuum forming machine. They were the first company in N Ireland to offer an Industrial Vacuum Forming Service.
1999 Vacuum forming gradually took over from GRP and by 1999 it accounted for 87% of sales.
2007 The company was incorporated to Donite Plastics Ltd with Michael Knight as the sole Director.
2015 Although Donite no longer does GRP moulding they have taken on many other processes to complement their vacuum forming service. This includes CNC machining, line bending, plastic punching/ pressing and most recently Laser Cutting and engraving.
2017 Donite moved to a new workshop in Saintfield, Co. Down. They also began an extensive equipment modernisation program.
2018 Brand new very large Vacuum Forming and 5-axis CNC machines installed. They now have some of the most advanced machines in the business.