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Speciality Chemicals
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Your Partner in Speciality Chemical Processing
From high-performance catalysts to sustainable water treatment, we serve a diverse range of critical industries. As leaders in speciality chemical processing, our portfolio includes specialised additives for polymers, plastics, and flame retardants, as well as essential solutions for the oilfield, biocide, and de-icing sectors.
Ask an expert
enquiries@exwold.com
Phone Number
+44 (0)1429 230340
Main Address
PO Box 270, Brenda Road, Hartlepool, TS25 2BW, UK
Contact us by telephone on +44 (0)1429 230340 so we can discuss your requirements or email us at enquiries@exwold.com
Biocides & Water Treatment
Exwold formulate and process chemicals used extensively as biocides and in water treatment applications.
Methods we use for water treatment chemical formulation and biocide processing include:
• Compaction • Powder Blending • Impregnation
• Liquid Blending • Milling
Biocides
Biocides are commonly used in agriculture, forestry and in industry where they prevent the fouling of water and oil pipelines. Today, we produce bespoke formulations for disinfectant applications and provide a flexible service that allows you to tailor your biocidal product to individual markets and customers.
Water Treatments
Water treatment describes those processes used to make water more acceptable for a desired end-use. Exwold works with a number of clients who require the delivery of their water treatment chemicals via a slow release granule. Exwold’s expertise in the area of creating ‘bespoke’ granules gives a strong competitive advantage.
If you need your catalyst in a granular or bespoke form, let’s discuss your specifications. You can contact us on +44 (0)1429 230340 or e-mail us at enquiries@exwold.com
Catalysts
Exwold’s specialised capability in granular active ingredient delivery makes us a natural leader in contract catalyst manufacturing.
Typical methods used to process catalysts are:
• Compaction • Blending • Impregnation
• Coating • Extrusion • Size Reduction • Pan Granulation
Catalysis
The world of catalysis demands precision across a vast range of chemical natures. At Exwold, we provide the processing expertise to bring your catalytic materials to market in their most effective physical state.
Our experience includes:
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Multifunctional Solids
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Transition & Precious Metals
Let’s discuss your specifications. You can contact us on +44 (0)1429 230340 or e-mail us at enquiries@exwold.com
Flame Retardants
Exwold is a specialist in flame retardant processing, which are extensively used throughout the chemical industry:
Typical methods used to process flame retardants are:
• Compaction • Blending • Impregnation
• Coating • Sieving
Efficiencies
Exwold works with manufacturers to ensure flame retardant products are stable, compliant, and safe to handle. We provide guidance on the most effective granular formats for specific market applications.
By utilising compaction processes, we transform fine powders into low-dust granules. This improves safety during transport and application while increasing dosing accuracy and reducing material waste. Our focus is on providing a functional, process-ready form that supports both worker safety and manufacturing efficiency.
To discuss polymers and plastic additive requirements, contact us on +44 (0)1429 230340 or e-mail us at enquiries@exwold.com
Polymers and Plastic Additives
Exwold is a specialist in polymer additive blending and processing, serving the complex demands of the plastics industry:
Typical processing methods include:
• Compaction • Blending • Granulation
Processes
• Milling/Grinding – provide additives, catalysts and intermediates in the correct particle size to optimise their activity.
• Blending – homogeneous blends of multi-component additive packages to reduce wastage, improve consistency and simplify production.
• Granulation – produce clean handling, free flowing, product forms of both single and multi-component formulations (can also incorporate liquid additives via this technology).
• Roll Compaction – a cost-effective route to produce clean handling and free flowing forms of additives and additive blends without the need for additional binders.
We have long standing experience in the processing of flame retardants, rubber additives, catalysts, biocides and intermediates and are adding to our resources in this important industry sector. Working with our polymer producers, additive manufacturers and polymer converter clients Exwold helps to provide cost-effective solutions to production and product form problems.
Our Resources Section
Discover our range of support services and browse our resource library for in-depth case studies and capabilities. Access key reports, policies, and guides in our downloads area, or visit our media and FAQ sections for more information.
Case Studies
Surface Coating Blending
A multinational company required a cost-effective 2mm granule of a waxy product used as surface coating additive .
The product had not been previously extruded. The material was supplied as a waxy solid block with a melting point below 100 ºC.
The material also required careful handling as it was corrosive and a significant aim was to reduce contact hazards.
Surface Coating Additive Milling
Exwold was approached by a leading chemical company to process a range of automotive surface coating additives.
The surface coating additive is produced as a molten solid in drums. Once cooled it forms a waxy, solid mass. The material has a low melting point <50ºC. The client required this in physical form to charge into coating with a specific particle size distribution to ensure dispersion.
Coating Processing
A powder coating manufacturer contacted us to establish whether a process could be established to recycle fines (the fine powder generated and removed during powder coating manufacture).
The company was sending around 10-25mt of fines to landfill each year and wanted to reduce the environmental and financial impact. The fines ranged in PSD but were typically 150 microns.
Downloads
Supplier Code of Conduct
Exwold is committed to doing business responsibly, ethically and sustainably at all times.
The company adheres to the highest code of conduct and expects its suppliers to do the same. Exwold will only deal with suppliers, consultants and distributors who conduct business in an ethical and responsible manner. Our supplier code of conduct ensures we work together.
Booking In Form
Our booking-in form ensures every collection and delivery to site is managed safely, efficiently, and with transparency.
By confirming arrival times and key details in advance, we can prepare the right resources, minimise delays, and maintain a secure working environment. It also provides a clear audit trail for all shipments, helping us protect product integrity and meet regulatory and safety requirements.
Reports
ESG Report 2025
Our ESG Report embodies our commitment to sustainability, ethical business practices, and transparency. Through this report, we detail how we measure and manage our environmental impact, uphold human rights and employee well-being, and enforce high standards of corporate governance. By doing so, we build trust with stakeholders and demonstrate accountability, showing that profitability and responsibility can go hand in hand.
Particle Size Distribution
Particle Size Distribution (PSD) is a key factor that determines how powders and granular materials behave during processing and final use. Even with identical chemistry, variations can affect flow, stability, reactivity, and product appearance.
This guide outlines what PSD is, why it matters, and how effective measurement and control lead to greater efficiencies and quality.
Frequently Asked
Questions
Can you perform batch processing?
Exwold specialises in batch processing. Batch sizes vary from a few hundred kilograms to tens of tonnes. We also have continuous processing available with extrusion processes.
Do you sell your own products?
No. Exwold specialises in contract manufacture and in order to avoid any conflicts of interest with our clients, we have chosen to specialise only in contract processing and do not offer our own products.
Can you carry out multi-stage processing?
Yes our expertise and flexible plants allow us to combine processing technologies, for example, we regularly combine blending with our granulation capabilities.
What is your minimum order quantity for processing?
Exwold typically works in the 10 to 1000 tonnes range for clients but processes can be evaluated and adapted on a case by case basis depending on process requirements.
Our pilot facility allows us to produce trial quantities and the High Active Herbicide facility is designed to produce in volumes of 100Kgs upwards.
Can we visit Exwold to perform an audit?
We welcome all our clients to our sites so they can perform audits. We have accreditation to ISO 9001/14001/45001 standards and are looking for continuous improvements in our quality systems, so encourage all customer feedback.
Can you process foodstuffs and pharmaceutical products?
Our expertise is in the speciality chemical and agrochemical markets and as a consequence. Exwold does not currently offer services to the food or pharmaceutical markets.
Can you purchase raw materials for clients as well as manufacture?
Typically our customers prefer to source their own materials but Exwold is willing and able to source raw materials when required.
Our purchasing department can offer expert assistance in sourcing raw materials and packing requirements.
Can you do pre-production trials?
Yes. Our technical department is fully trained to perform and support pre-production trials. We often encourage trials before production so that we can evaluate any technical challenges and arrive at an accurate costing.
The technical development centre is well equipped to enable us to test all the technologies we have at scale.
Can you process solvents?
We tend to work mostly in aqueous phase, but can evaluate opportunities with solvents which have a flash point of >60°.
What quality, environmental and health and safety systems do you operate?
Exwold is certified to the ISO 9001/14001 standards.
In 2019 Exwold gained ISO 45001.
Where are you based?
We have five manufacturing sites which are all based in the North East of England near the town of Hartlepool.
This area has exceptional transport links to the rest of the UK and Europe.
Would you be prepared to buy capital equipment to meet a client’s processing needs?
At Exwold we regularly work with customers in this way and our engineering team can offer in-house expertise in plant modifications and design.
With our clients we have jointly invested over £4 million in plant and equipment.
Should we have concerns regarding contamination?
This is of critical importance to Exwold and it is the most asked question by our clients.
We have sophisticated clean-down procedures for every piece of processing plant and all our plants are accredited with ISO 9001/14001 status.
We operate a plant dedicated to high active herbicides and have warehousing and manufacturing separation between herbicides and insecticides.
Products are tested by a third party analytical company to detect residual impurities to low ppm levels.
Is Exwold sustainable?
Yes. Sustainability is a core focus at Exwold. We continuously invest in renewable energy, such as the solar panels at our Tofts Farm plant, and are actively installing new equipment across all sites to reduce plastic waste and environmental impact.
What type of packing does Exwold provide?
Exwold offers packing as an added value to bulk manufacture. We often hold the bulk in stock providing the ultimate flexibility to pack off as required.
We can pack small bottles for high active herbicides (100-1000g).
We are used to handling multiple packing SKUs for products and we pack from 1kg to 1000kgs in a variety of packaging types, including jerricans, paper and foil bags, kegs, FIBCs and bottles.
Can you provide supply product with 2D matrix labelling?
Yes. We have been investing in this capability following the regulatory requirement to include this when supplying crop protection products to countries such as France and Turkey.
How much will you charge me?
We look to offer competitive rates and, since every processing job is bespoke, we evaluate every opportunity on a case by case basis.
We are able to provide indicative prices at early stages of discussion to ensure project viability.
I know I want a granule made but not sure of how, can you help me?
Our technical team can help to determine which technology is best using their expert granulation knowledge and by asking a few simple questions such as granule size, specific physical properties required and application. From this they will suggest the best options to fulfil your needs.
The Technical Development centre can be used to assess whether this technology produces your desired granule and can support customer trials.