Below is a list of all members of the CAA.

Full members manufacture and sell admixtures: BASF, Cementaid, CEMEX, GCP Applied Technologies, Oscrete, Sika.

Associate members sell supporting products: Borregaard, Elkem, Schulke, Yara.

Click the links above or the company name below to get full details of the member.

BASF Construction Chemicals

BASF Construction Chemicals is the world leader in the manufacture of concrete admixtures. At the forefront of technological innovation, the Admixture Systems division excels at developing advanced new products for the ready-mix, precast, manufactured concrete products and underground construction industries via an international network of R&D centres in Europe, America and the Asia-Pacific regions.  In the UK, BASF admixtures are manufactured and distributed from their production facility based in Swinton, Manchester.  A full product range is available covering both normal and high performance admixtures, together with a range of mortar products.  Ancillary materials such as curing membranes and release agents supplement this.  The Company also provides a comprehensive range of concrete repair and refurbishment products, sealants, waterproofing and a full merchant range.  The UK Company provides a channel for worldwide technical support at all stages, backed up by in-house laboratories in Manchester and Rochester.

Borregaard UK Ltd

Borregaard UK is the UK subsidiary of Borregaard Lignotech ( BLT). BLT, in turn is a division within Borregaard. Borregaard operates the world’s most advanced biorefinery. By using natural, sustainable raw materials, Borregaard produces advanced and environmentally friendly biochemical and biomaterials that replace oil-based products. The Borregaard Group has 1080 employees in 16 countries.  

BLT is the world’s leading supplier of lignin based raw materials for concrete water-reducing agents. The Concrete Industry is the single biggest Global application for Lignosulphonates. BLT has more than 60 years’ experience supplying binding and dispersing agents based on Lignin Technology. Our world-wide network of production facilities and sales offices assures the very best local service and competence where you need it.

BLT’s aim is to develop our Sales and Technical staff to be experts, not only in Lignin Technology, but also in its application in Concrete Admixture formulations. Expertise means not only satisfying the current needs of the Concrete Admixture Industry. Research and product development have high priority, and dedicated research teams in the R&D Centres in Norway, India and the USA work tirelessly to assist customers in meeting the future challenges in Concrete Admixtures.

Cementaid UK Ltd

The Cementaid Group, a privately owned British business started in 1952, has offices and manufacturing plants around the world making speciality admixtures for the concrete industry.  Best known of these in Britain is Everdure Caltite, a British Board of Agrément certified admixture for inclusion in structural concrete to provide waterproofing in place of membranes, even in grade 4 basements for archival storage.  The product has been used in many thousands of structures since its launch in 1958, in basements, tunnels, roofs and tanks, not only to provide waterproofing but also corrosion protection of the concrete and reinforcement in some of the most aggressive environments where concrete has been used.  Some notable structures in Britain where Everdure Caltite has been used include: Stadia – over 10,000m³ in the basement of the new No. 1 tennis court complex at Wimbledon (see adjacent photograph), Chelsea Football Club and the McAlpine Stadium in Huddersfield. Offices – IBM, Glaxo Wellcome, Glaxo SmithKline, Tesco head office and Northern Ireland regional headquarters, Britannic Assurance, Eagle Star, Prudential, Lloyds Bank, Co-operative Wholesale Society, DSS new building at Longbenton and Washington.  Hospitals – Ashford in Middlesex, Hairmyres at East Kilbride, Royal Sussex in Brighton, Redbridge in Essex, Royal Marsden, Great Ormond Street, Crowborough and Cheltenham.  Supermarkets – 28 Tesco Stores, Waitrose, Sainsbury, Marks & Spencer and ASDA.

CEMEX Admixtures PLC

CEMEX Admixtures operates as part of CEMEX, a leading global producer of cement, readymix concrete, aggregates and other building materials. The business combines a deep knowledge of local markets with a global network and information technology system to provide world-class products and services to customers from individual homebuilders to large industrial contractors. CEMEX Admixtures is a national business that started in 2000 and produces a full range of admixtures from its purpose-built factory in Rugby, Warwickshire. This range of admixtures is designed for use in the ready mixed concrete, mortar, precast and block industries. The Company has its own research and development staff and liases closely with other CEMEX admixture producers within Europe. Its knowledge of both concrete and admixtures has enabled it to develop specialist concretes specifically designed for exacting customer requirements.

Elkem Materials

Elkem Materials is a unit of the Norwegian based company Elkem ASA – one of the world’s largest metal producers.  Elkem Materials markets the co-products from the metals operations, principally Elkem Microsilica® (aka: Silica Fume).  This product is a highly reactive, superfine pozzolana and can be used to enhance the properties of most cementitious applications.  Major fields of use are in the fibrecement, refractory and concrete industries.  Research on microsilica began in the early 1950s and the product is now used world-wide to increase the durability and performance of concrete.  The advantages include; longer lifetime of structures; better chemical resistance; higher strength and increased corrosion resistance.  As well as the sale of high quality microsilica, Elkem Materials offer; global supply and distribution; an international sales network; advice on handling and production; full technical assistance including a research and advisory service.


GCP Applied Technologies was formed in January 2016 by the spin-off of W. R. Grace & Co.’s construction products segment and its packaging technologies business. In the UK the business is the market leader in cement and concrete admixtures as well as being a major player in structural waterproofing   Based in Warrington, Cheshire, the Specialty Construction Chemicals division of GCP manufactures and supplies chemical admixtures to all areas of the concrete manufacturing industry.  The Company’s products are known for quality and proven performance supported by a high level of technical service from qualified staff.  Development of new materials to protect and improve concrete is an on-going strategy of the business and has been successful in gaining the Company’s reputation for innovation and customer service.  High performance chemical products to reduce shrinkage and control corrosion in concrete are typical advancements from the Company’s R&D laboratories based in Cambridge, USA.  The introduction of these technologies is carried out by specialised engineers advising Consulting Engineers on all aspects of concrete design.  GCP Applied Technologies operates globally in over 40 countries and serving customers in more than 110, employs over 2,400 people and has sales exceeding $1.5 billion.

Oscrete Construction Products

Oscrete Construction Products are part of the Christeyns NV group, based in Gent, Belgium. The Company manufactures and distributes formulated chemical products with four divisions; concrete admixtures, laundry products, industrial soaps and consumer products. Each division is responsible for its own marketing and servicing to provide a focus and meet the specific needs of the industries it serves. The Oscrete Division, office and manufacturing, is based at Bradford, West Yorkshire. It supplies and services the Oscrete range of admixtures to the concrete industry. A wide range of Oscrete admixtures is available for all applications, with specifically formulated products for the precast and mortar industries. The Company has its own testing laboratory and technical staff providing a comprehensive technical service. All products are manufactured under the regime of ISO 9001 Quality System and delivered by the Company’s own fleet of fully equipped vehicles. Oscrete admixtures have established a reputation for quality and service which is supported by a commitment to future development.

Schülke & Mayr GmbH

Schülke & Mayr GmbH were founded in Hamburg in 1889 which saw the beginning of a pioneering company – developing the first branded disinfectant, the first preservative for metalworking fluids, the first patented preservative for water-based emulsion paints, patented cosmetic preservative actives and patented synergistic blends for technical product preservation. Today, schülke manufactures over 200 speciality products, has subsidiaries throughout Europe, USA and China together with distribution partners globally ensuring an international availability of our products and services. The company is part of Air Liquide Group which has 40,000 employees and a turnover of nearly €12 billion. In the UK, as in all subsidiaries, schülke offers hygiene training and products to the hospital, dental and medical industries through the Hygiene International division. For the personal care, metalworking and building and construction industries, the Special Additives International division works with one aim – to avoid microbial contamination in our customers’ products and processes using a comprehensive Microbiological Quality Management concept. Due to the water-based character of many concrete admixtures and their composition they are a suitable media for microbial growth. Our parmetol® and grotan® products offer cost effective preservation of polycarboxylate, lignosulphonate, sugar or molasses based admixtures. A range of products are available based on various biocidal chemistries. Advice from chemists and microbiologists in the UK coupled with our extensive R&D facility in Germany with industry based expertise will ensure customers obtain the optimum solution for the preservation of their admixture and the best advice for plant hygiene measures.

Sika Ltd

Sika is a speciality chemicals company with a leading position in the development and production of systems and products for concrete, waterproofing, roofing, flooring, refurbishment, sealing & bonding and industry.

Sika develops and markets a complete range of admixtures and additives for use in concrete, cement and mortar production. These products enhance specific properties of the fresh or hardened concrete, such as workability, watertightness, durability, load-bearing capacity or early and final strength. The demand for admixtures and additives is currently on the rise, particularly due to the increased performance requirements placed on concrete and mortar, especially in urban areas and for infrastructure construction. Furthermore, the growing use of alternative cementitious materials in cement, mortar, and therefore also in concrete, increases the need for admixtures


Extended workability, controlled over several hours, is especially important for urban construction sites with congested traffic, or remote areas resulting in long transportation times. At the same time, once the concrete is placed, fast curing is of utmost importance to meet tight construction schedules. Sika ViscoFlow® is a workability enhancing admixture, based on a new inhouse-developed polymer which significantly prolongs the workability time of the fresh concrete and still ensures equally fast strength development. The workability time can be modified in accordance with project specific needs. Furthermore, the required consistency of the concrete is ensured in high as well as in low temperature climates.

Sika’s solutions also cover a full range of technologies used for structural waterproofing, including: flexible membrane systems, liquid applied membranes, waterproofing admixtures for concrete, joint sealants, waterproofing renders, injection grouts and coatings.

Yara UK Limited

Yara International ASA is a global company that specialises in nitrogen chemistry. Founded in Norway in 1905, Yara has a worldwide presence with sales to over 150 countries.

We deliver solutions for sustainable agriculture, industrial solutions, the environment and our mineral fertilizers and crop nutrition programs help produce the food required for the growing world population.

Our industrial products and solutions reduce emissions, improve air quality and support safe and efficient operations: AdBlue (Air1) for vehicle NOx reduction, NOxCare for Maritime NOx emission control, Nutriox for the waste water industry and technical urea for animal feed solutions (Rumisan).

Also in our Industrial portfolio, Yara are major providers of CO2: for the food and drinks industry, CO2 for inerting purposes, Dry Ice for food distribution and storage and surface blasting.

Yara UK Ltd also produce NitCal, a multi-functional calcium nitrate based admixture component, for the concrete industry. Yara supply and work closely with all the admixture companies to ensure that they, and their customers, benefit from NitCal’s admixture multi-functionality, which includes setting acceleration – used for cold weather concreting and corrosion inhibition properties. NitCal can be used on its own or is compatible with other admixture components, often bringing an interaction benefit when combined with other components.

Yara pride themselves on their international network and knowledge base to their ability to provide solutions globally and at a local level.