GCP Functional Additives

Adding value to cement.


There are a number of factors that define good cement. Does it set within the time desired? Is it easy to shape and work with? Does it dry without cracking or shrinking? For cement manufacturers, these factors will determine the overall desirability of their product. We offer a wide range of liquid additives that let manufacturers create quality cement, whilst remaining compliant with a broad range of regulations. We deliver cement functional additives for water reduction, workability, chromium reduction and air entrainment.

What is the advantage of functional additives?

Our functional additives let manufacturers improve the quality of their cement while complying with standards such as EN and ASTM. These products impart specific functionalities to cement, such as promotion of air entrainment, increased workability and reduced chromium to the desired level.

Narrow and general performance improvement

AIRALON® admixtures are designed to be the most effective product to promote air entrainment in masonry cement. This improves water retention and enhances mortar workability. HYDROPHOBE® cement additives and TYTRON® cement admixtures impart superior water repellency, increased workability, and extended board life.

Compliance with chromium regulations

Since the introduction of European Directive 2003/53/EC, cement manufacturers must take extra precautions to control the level of chromium in their products. SYNCHRO® liquid additive is specifically formulated to reduce the level of chromium ions in cement mixed with water. SYNCHRO® liquid additive is easy to use and otherwise does not affect material performance, while remaining compatible with other cement and concrete admixtures.

Highly customizable enhancement

We work in collaboration with cement manufacturers to create a material that is perfectly optimized for a given plant—allowing the cement producers to make the best cement for the needs of their customers. We gladly offer tailor-made solutions for individual plants and cements, and can provide training to cement plant personnel and audit grinding systems to ensure that the maximum value is extracted from the functional additives.

Products & Accessories


  • Product Name
  • Description
  • Key Benefits
  • Applications Type
HYDROPHOBE® Cement Additive Data Sheet

The HYDROPHOBE® series of additives are multi-purpose, second generation additives to be interground during the manufacture of prepared masonry cement, to entrain air, impart water repellency, control setting time, extend board life and improve workability.

Key Benefits
  • Imparts superior water repellency and workability
  • Extended board life
  • Single material addition
  • Tailor-made formulations
  • Economical use cost
Application Type

The HYDROPHOBE® product line is designed for the economical production of high quality masonry cements and mortars.

RDA™ Additive for Cement Aid Data Sheet

RDA™ is a chemical additive to be interground during the manufacture of Portland and blended cements to retard the initial and final set of cement pastes and mortars.

Key Benefits
  • RDA controls effectively the setting process and permits significant extension of the board life.
Application Type
  • RDA is used wherever a delay in setting time will insure sufficient delivery, placement, vibration or compaction time
SYNCHRO® 100 Reducing Additive Data Sheet

SYNCHRO® 100 is a patent pending liquid additive that has been formulated around stannous sulphate

Key Benefits
  • Exceptional cement storage stability
  • Ease of use
  • Liquid Additive
  • No staining or retardation
  • Compatible with cement additives and concrete admixtures
Application Type

SYNCHRO® 100 is used to reduce the level of soluble chromium(VI) ions present when cement is mixed with water.

TYTRONIX® Cement Admixture Data Sheet

TYTRONIX® is a proprietary product developed at the research laboratories of GCP. It utilizes a revolutionary new chemistry that results in a dramatic improvement in the performance of low air mortar cements.

Key Benefits

TYTRONIX® use allows cement manufacturers to achieve the high flexural bond strength and low air levels consistent with the requirements of the ASTM C 1329-96 Standard Specification for Mortar Cement.

Application Type
TYTRON® Cement Admixture Data Sheet

TYTRON® is a proprietary technology developed at the research laboratories of GCP. It represents a revolutionary new chemistry for use in the production of cement for masonry applications.

Key Benefits

TYTRON® use allows cement manufacturers to achieve performance consistent with the requirements of ASTM C 91-95c Standard Specification for Masonry Cement.

Application Type