Xypex is a non-toxic chemical treatment for the waterproofing and protection of concrete.

The primary and most distinguishing performance feature of Xypex is its unique ability to generate a non-soluble crystalline formation deep within the pores and capillary tracts of the concrete - a crystalline structure that permanently seals the concrete against the penetration of water and other liquids from any direction.

Xypex crystalline products are dry powder compounds composed of Portland cement, silica sand and many active, proprietary chemicals.

How Xypex works

Integration within the concrete structure

To create its crystalline waterproofing effect, Xypex becomes an integral part of the concrete mass.

It does so by taking advantage of the natural and inherent characteristics of concrete; concrete is both porous (capillary tract system) and chemical in nature. By means of diffusion, the reactive chemicals in Xypex use water as a migrating medium to enter and travel through the capillary tracts in the concrete.

Unique crystalline barrier

This process precipitates a chemical reaction between Xypex, moisture and the natural chemical by-products of cement hydration (calcium hydroxide, mineral salts, mineral oxides and un-hydrated and partially hydrated cement particles).

The result is crystallization and ultimately a non-soluble crystalline structure that plugs the pores and capillary tracts of the concrete. In this condition the pores become discontinuous and the concrete is thereby rendered impenetrable by water and other liquids from any direction. The Xypex crystalline process will reactivate whenever water is present.

Potentially active for the life of the concrete

The Xypex crystalline process will reactivate whenever water is present. The crystallization process that Xypex causes within the pores and capillary tracts of concrete is illustrated below in electron microscope photos taken by an independent research team.

3 Stages of Xypex in action

Stage 1 - Untreated

Stage 1

A control sample of concrete was sheared through at 50mm below the top surface.

The sheared face shows some of the by-products of cement hydration with which Xypex reacts. Precipitated calcium hydroxides together with cubic and rhombic particles are visible.

Stage 2 - Initiation

Stage 2

Taken at 50mm within a Xypex treated concrete sample.

This photograph shows the initiation of the Xypex crystalline reaction after Xypex Concentrate was applied to the surface.

Stage 3 - Maturation

Stage 3

This photo was taken 26 days after the application of Xypex Concentrate at a depth of 50mm into the concrete sample.

A dense, fully developed crystalline structure has formed within the capillary tracts of the concrete to completely block the flow of water.