Xypex Concentrate Grey is a high-performance, cementitious crystalline waterproofing powder designed to waterproof, protect and repair concrete structures.

When mixed with water and applied as a slurry, the active chemicals penetrate the concrete and react with its by-products to form an insoluble crystalline structure within the pores and capillaries of the concrete. This crystalline network helps block water penetration and provides long-term protection against hydrostatic pressure.

Xypex Concentrate Grey can be used on both the positive and negative sides of concrete structures, making it a versatile solution for below-ground and water-retaining applications.

Key Features & Benefits

• Crystalline waterproofing technology: Forms an insoluble crystal network within the concrete pores and capillaries.

• Deep concrete protection: The waterproofing reaction becomes an integral part of the concrete rather than simply forming a surface membrane.

• Positive and negative-side waterproofing: Can resist hydrostatic water pressure from either direction.

• Crack sealing: Can help seal static hairline cracks up to approximately 0.4–0.5 mm under suitable conditions.

• Long-lasting waterproofing: Provides durable protection against water penetration.

• Cementitious formulation: Mixed with clean water and applied as a slurry by brush or suitable application equipment.

• Potable water applications: Complies with AS/NZS 4020 requirements for contact with drinking water.

• Suitable for concrete repair and protection: Ideal for a wide range of structural and waterproofing applications.

Common Applications

Xypex Concentrate Grey is suitable for waterproofing and protecting many types of concrete structures, including:

• Retaining walls

• Basement walls

• Concrete slabs

• Water tanks

• Swimming pools

• Reservoirs

• Water treatment structures

• Concrete foundations

• Tunnels

• Below-ground structures

• Water-retaining concrete structures

• Concrete structures exposed to hydrostatic pressure

Coverage & Application

Product: Xypex Concentrate Grey
Packaging: 20 kg bucket
Application: Mixed with water and applied as a slurry
Typical coverage: Approximately 0.65–0.80 kg/m² per coat
Water pressure resistance: Suitable for positive and negative hydrostatic pressure
Crack sealing: Static hairline cracks up to approximately 0.4–0.5 mm, subject to application conditions

Actual coverage can vary depending on the concrete surface, substrate profile, application method and required coating thickness. Always consult the manufacturer's current technical data sheet for specific application requirements.

How Xypex Concentrate Works

Unlike a conventional waterproofing membrane that sits primarily on the surface of concrete, Xypex Concentrate uses crystalline waterproofing technology.

When the product is applied to suitably prepared concrete, its active chemicals react with moisture and cement hydration by-products. This reaction produces insoluble crystalline formations that grow within the concrete's capillary pores and micro-cracks.

The resulting crystalline structure helps block the passage of water while allowing the waterproofing treatment to become an integral part of the concrete.

Why Choose Xypex Concentrate Grey?

For concrete structures exposed to water, hydrostatic pressure or moisture ingress, Xypex Concentrate Grey provides a durable alternative to conventional surface waterproofing systems.

Its ability to work from either side of a concrete structure makes it particularly useful for basements, retaining walls, tanks and other below-ground structures where access to the exterior or positive side of the concrete may be limited.

The crystalline waterproofing reaction also provides protection within the concrete itself, rather than relying solely on a surface coating.