Xypex React 20 kg pail
* Available only in USA and Canada
Xypex React

Crack-Healing Accelerator

Xypex React

Accelerated Crack Healing

Xypex is a unique chemical treatment for the waterproofing, protection and repair of concrete.

XYPEX React consists of cement, sand and active proprietary chemicals specially designed to compliment Xypex Admix to accelerate static crack healing in critical applications. It is applied as a cementitious slurry to the pre-saturated surface of cracks less than 0.5 mm in above and below-grade structures. The active chemicals are designed to diffuse into the substrate and react with Xypex Admix to cause a catalytic reaction. This reaction generates accelerates Xypex’s proven performance for projects that require an accelerated time line for crack healing, permanently sealing the concrete and preventing the penetration of water and other liquids from any direction, even under high hydrostatic pressure.

Surface-applied crystalline crack-healing accelerator

Works with Xypex Admix to accelerate crack sealing

Performance accelerator within Xypex system

Not a standalone waterproofing solution

Advantages

  • Resists extreme hydrostatic pressure
  • Becomes an integral part of the substrate
  • Quickly heals static hairline cracks up to 0.5 mm
  • Can be applied to the positive or the negative side of the concrete surface
  • Allows concrete to breathe
  • Highly resistant to aggressive chemicals
  • Non-toxic / no VOCs
  • Does not require a dry surface
  • Cannot puncture, tear or come apart at the seams
  • No costly surface priming or leveling prior to application
  • Does not require sealing, lapping and finishing of seams at corners, edges or between membranes
  • Does not require protection during backfilling or during placement of steel, wire mesh or other materials
  • Less costly to apply than most other methods
  • Not subject to deterioration
  • Permanent

Recommended for

  • Reservoirs
  • Sewage and Water Treatment Plants
  • Underground Vaults
  • Secondary Containment Structures
  • Foundations
  • Tunnels and Subway Systems
  • Swimming Pools
  • Parking Structures

Packaging

Xypex React is available in 50 lb. (22.7 kg) and 44.1 lb. (20 kg) pails.

Coverage

For normal surface conditions, the coverage rate for each Xypex coat is 6 – 7.2 sq. ft./lb.

Storage

Xypex products must be stored dry at a minimum temperature of 45°F (7°C). Shelf life is two years when properly stored.

Frequently Asked Questions

Xypex React FAQ

Xypex React is a surface-applied crack-healing accelerator designed to work specifically with Xypex Admix. It accelerates the crystalline reaction at cracks, enabling faster sealing of static cracks up to 0.5 mm, rather than acting as a primary waterproofing system.

No. React is complementary, not a replacement. It enhances Admix performance by accelerating crack healing but relies on the crystalline system already present in the concrete.

React is designed for:

  • Static cracks only
  • Cracks ≤ 0.5 mm (0.02 in)
  • No active water flow

Larger or leaking cracks must be repaired first using standard Xypex repair methods.

Primarily applied on the positive side (water-pressure side) for best performance, especially under hydrostatic pressure conditions.

React’s active chemicals diffuse into the concrete and react with Admix to trigger a catalytic crystalline growth, accelerating crack sealing and blocking water pathways permanently.

React is designed to accelerate the natural crack-healing process, significantly reducing timelines and seals cracks up to 50% faster, compared to Admix alone. Exact timing depends on conditions such as moisture availability and crack size.

The surface must be:

  • Clean and free of contaminants
  • Open capillary structure (CSP-3 recommended)
  • In SSD condition (saturated surface dry) prior to application

Proper prep is critical for performance.

No. The concrete must be in SSD condition. Water is required to activate the crystalline reaction and allow penetration into the concrete matrix.

React is ideal for:

  • Water and wastewater structures
  • Tunnels and below-grade structures
  • Reservoirs and containment systems
  • Foundations and parking structures

React is optimal for any environment where you want the Admix to seal faster. It performs under hydrostatic pressure and aggressive chemical exposure.

Unlike membranes:

  • React becomes integral to the concrete
  • It cannot delaminate, puncture, or tear
  • It works from within, not just at the surface
  • It provides permanent crack sealing, not a barrier layer

This results in longer-term durability and reduced maintenance.

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