Commercial Water-Proofing – Urethane Injection

Written By Rashad Russell

What is Urethane Injection Waterproofing for Commerical Uses?

When it comes to keeping buildings dry, the industry standard is a polyurethane injection (also referred to as a urethane injection). With enough time and pressure, concrete walls are eventually encounter cracks. These cracks allow water and moisture into your building. In order to seal these cracks and fissures, Kaufman specializes in urethane injections to ensure minimal leaking. The most common cases where this repair is applicable, includes cast in place concrete walls and slabs, found commonly in basements, parking garages, and more. Urethane injections prove to be an economical solution for your waterproofing needs and Kaufman has the expertise and experience to deliver a great waterproofing product.

How is Urethane Injection Waterproofing Applied?

Simply pumping urethane into a concrete crack will only provide temporary relieve from wall and slab leaks. The first step of a proper urethane waterproofing injection is to drill holes alongside the crack to ensure the urethane provides as much structural integrety as possible. After the holes have been drilled alongside the crack, we install nylon injection ports to pump in material.

A high pressure pump is used to administor water and acid, which cleans the crack of debris and leaves a clean surface for the urethane to adhere to.

After the acid/water mixture is flushed from the crack, we inject the polyurethane. A chemical reaction between the polyurethane and water causes the urethane to expand and fill the crack completely. We inject every 4″ (or per project spec) allowing the urethane to expand and fill the crack entirely.

Common Uses for Urethane Injection Waterproofing

Urethane Waterproofing has a variety of common applications. These include:

  • Basements

  • Parking Garages

  • Actively leaking cracks

  • Previously repaired cracks that continually leak

  • I-beam pockets

  • Concrete honeycombing

  • Pool bottoms

  • Concrete seams (created by a cold poor)

  • Bridges

  • Overhead concrete structures

  • Gaps/Seams in window cutouts

  • Pipe penetrations

  • Tie-rod holes

Rashad Russell
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