TOPCOR Services, Inc. has a history of solving our client's most complex leaks in various concrete structures using POLYURETHANE CHEMICAL GROUTS. We are certified with several manufacturer's products and can offer a variety of repair procedures specifically designed around the situation.

URETHANE CRACK INJECTION is utilized to prevent water leakage or to stop an actively leaking crack using a polyurethane chemical grout. If there is concern about material leaking out the back of a crack, polyurethane foams can be used. These flexible to semi-flexible, fast-setting foams are effective alternatives for applications involving only crack sealing (waterproofing) and not structural repair. Because of their flexible nature, they are able to accommodate slight concrete movement so the seal stays intact. They also begin to harden and foam within minutes of injection. This reduces the chances of the material flowing out of an injected crack while still in liquid form, and even if some does leak out, the foam will fill the void.

SPECIALTIES:

  • Waterproofing
  • Grouting on Joints/Cracks
  • Soil Stabilization
  • Waterstops using Tube Injection Systems
Materials:

For Urethane Crack Injection, most of the polyurethane chemical grouts used are single component (water activated) or two component (resin/catalyst). These grouts can have two distinctly different properties, either being hydrophobic or hydrophilic. Hydrophobic grout will repel water (push it away), has high expansion, and cures rigid. Hydrophilic grout will absorb the water that it finds in the soil or concrete, has lower expansion, and cures to a flexible foam. Both grout types are water activated for use in wet environments. These polyurethanes will vary in viscosity and can be accelerated depending on temperature and amount of catalyst used.

Equipment and Application:

TOPCOR uses high pressure, positive displacement grout pumps, hand pumps, and multi ratio devices. Mechanical packers are used for injection pressures between 300-3,000 psi. Depending on the location and environment, TOPCOR has access to various sizes and lengths of mechanical packers. Urethane Crack Injection is usually performed in a wet environment, thus requiring a means for injecting the resin through mechanical injection packers.