Why Xypex and not a membrane

This illustration of concrete shows how Xypex crystalline technology works to remedy the primary problems that concrete encounters because of its naturally porous condition. The illustration also highlights the areas where traditional barrier and membrane systems are weak or ineffective and why Xypex products provide a reliable solution.

1. The Problem with Membranes

Membranes and other traditional barrier systems are intended to work on the outside of concrete. They rely on the bond they achieve with the concrete surface. The illustration shows what can occur when the surface-bond of a membrane is broken. Whether by puncturing or hydrostatic pressure, the membrane has delaminated, opening pathways through which water and other damaging liquids can easily enter, penetrate and damage the concrete. The protection, durability and overall integrity of the concrete is weakened, and the reinforcing steel has corroded.

2. The Xypex Crystalline Solution

Xypex products are designed to work inside the concrete. Xypex chemicals penetrate the pores and capillaries of the concrete, react with the by-products of cement hydration and form a non-soluble crystalline structure deep within the slab. In this condition, the concrete becomes impermeable, preventing the penetration of water from any direction, and preventing the corrosive effects of moisture and oxidation on reinforcing steel.

3. Resisting Aggressive Chemicals

Xypex products are used on many projects where aggressive chemicals threaten the integrity of concrete. Wastewater treatment plants, bridges, chemical containment structures, highways and marine environments all benefit from Xypex crystalline technology and its ability to prevent the penetration of a wide range of chemicals including mild acids, solvents, chlorides and caustic materials. Because Xypex is pH specific, it will protect concrete from any chemical whose pH range is 3.0 to 11.0 constant contact, or 2.0 to 12.0 periodic contact.

4. Resisting Hydrostatic Pressure

Reservoirs, swimming pools, aquariums, wastewater treatment plants, dams, marine and a host of below-grade structures are subject to the pressure of water and other fluids from either the inside or the outside of their concrete framework. Because Xypex is not dependent on surface adhesion but instead becomes an integral part of the concrete mass, it is capable of resisting extreme hydrostatic pressure. Independent test results have shown that a two-coat application of Xypex eliminates leakage at pressures of at least 400 ft. of head pressure.