Injection is the process of inserting a liquid or flow-able material into a void or crack, which can strengthen and repair the structure. There are many possible materials used and each have their own nuances.
Epoxy structurally bonds materials together to create a monolithic structure. In the process, it eliminates the path for water to travel through and stops leaks. Epoxy is our preferred material choice as it does not trap water or shrink over time.
In certain circumstances, urethane injection or acrylate injection may be recommended for unique applications such as potable water reservoirs, soil stabilization, precast joints, curtain grouting etc.
As experts in injection services, we can recommend the right product for the job including NSF 61 certified products and Ministry of Transportation approved materials for bridges and overpasses.
After checking out the gallery, have a look at our injection FAQ below to clear up some common questions and misinformation regarding material capabilities.
Epoxy can't be used when there's water present.
The best resins have datasheets that support its use in dry, damp, or wet conditions.
A well trained epoxy injection technician will fix the worst of leaks, the first time around.
Wouldn't a flexible material be better?
Concrete and its reinforcing steel aren't designed to be flexible so why would it's repair material be? A concrete structure is designed with expansion joints to accommodate movement. As long as an expansion joint is maintained, the rest of the below grade structure can be repaired with rigid material.
We don't need a structural fix, we just need the water stopped.
Epoxy will do both, other materials will only do one, so why contaminate the area with non-structural material when there is a choice to do it right the first time?
There's a material that can be patched in and crystals grow into the crack, will that do the same thing?
Crystalline waterproofing does not have the ability to penetrate into the full depth of crack, potentially causing trapped water within the structure. That trapped water can corrode the embedded rebar causing concrete delamination, or saturate into the pores of the concrete causing efflorescence, flaking, and staining on vehicles. These repairs can even preventing paint from sticking to the repair area due to moisture and flaking.
There's a material that expands in the crack, wouldn't that be better?
As urethane reacts with water it creates air bubbles and the air bubbles within the resin cause it to expand. After the material has fully cured, its susceptible to drying out and shrinking over differing periods of time depending on the amount of catalyst used, moisture present, density of the foam cell structure etc. Expanding urethane foam in a residential setting can even clog and block perimeter drainage pipes. That's a lot of variables to determine how long the repair will last, why not just chose the permanent solution from the start?
We called our usual contractor and asked about epoxy, they said they absolutely could not fix a wet crack with epoxy and it just wouldn't work, is this true?
Not all contractors have the same experience and knowledge, so despite epoxy often being the superior material you still need to pick the right contractor. Our technicians are the best in the industry and are here to help with any injection project regardless of size or situation.
Contact Miller & Co Concrete Solutions Inc. to have a look at your project, with honest advice you can rely on.