Chryso is setting a new benchmark in concrete waterproofing across Africa as the first and only supplier of a high performance liquid crystalline waterproofing admixture – Chryso® CWA Liquid 200. This cutting-edge technology is revolutionising how the industry approaches integral waterproofing, delivering long-term protection from within the concrete itself.

When added to cement, Chryso® CWA Liquid 200 chemically reacts with the cement paste to form a non-soluble crystalline structure. This process reduces pore and capillary size throughout the concrete matrix, permanently sealing the structure and preventing water ingress. As a result, the concrete is waterproofed from the inside out, eliminating the need for external membranes, joints or surface treatments.

Patrick Flannigan, Chryso GM Technical and Product Support Management Africa, explains that Chryso® CWA Liquid 200 represents a leap forward in integral waterproofing. “It is not just about preventing water penetration – it is about fundamentally improving the performance, durability and longevity of concrete infrastructure. From a safety, environmental and quality perspective, the benefits over traditional powder-based solutions are significant.”

Using advanced nanotechnology, the liquid admixture offers multiple performance enhancements. These include increased concrete strength and resistance to chloride and sulphate ingress as well as protection against carbonation, chemical attack and freeze-thaw damage. Its ability to self-heal micro-cracks and hairline cracks up to 0.5 mm ensures long-term resilience, even in the most demanding environments.

The product is suitable for a wide range of applications including basements, water tanks, reservoirs, dams, tunnels, wastewater and water treatment plants, swimming pools, marine structures and roads and bridges. Flannigan says that because it is added directly to the concrete mix, it avoids the need for costly and time-consuming surface preparation and is not constrained by weather conditions which is an important advantage for large scale or fast track construction projects.

Another key benefit of Chryso® CWA Liquid 200 is its compatibility with all types of supplementary cementitious materials (SCMs), making it highly adaptable across different mix designs. It also complements Chryso’s broader range of admixture technologies, providing concrete producers with an integrated performance solution.

“Unlike powder waterproofing products that are manually added at batching plants, our liquid solution is accurately dosed through Chryso dispensing systems,” says Flannigan. “This means improved traceability, consistent quality and reduced health and safety risks associated with powder handling.”

The liquid format also improves concrete workability and can enhance hydration, reducing the need for other admixtures and helping optimise cost control. Importantly, Chryso® CWA Liquid 200 is non-toxic, contains no VOCs and is environmentally friendly - aligning with modern demands for greener construction methods.

“Chryso’s commitment is not only to develop high performance admixtures and construction chemicals but also to support our customers throughout the construction process,” Flannigan adds. “We offer full technical backup, ensuring each mix design is optimised for maximum waterproofing performance.”

With Chryso® CWA Liquid 200, the company is reaffirming its leadership in innovative admixture technology, delivering waterproofing and corrosion protection solutions that extend the life and performance of concrete while helping to meet evolving industry standards for sustainability, safety and efficiency.