You might hear two terms when you start searching for solutions for foundation cracks: epoxy injection and polyurethane injection. But which one is better? In this post we will discuss when and how to use each one and their advantages and disadvantages. In the end, you will be in the best position to decide which approach is right for you.
DIFFERENCE BETWEEN EPOXY AND POLYURETHANE INJECTION:
Epoxy and polyurethane resins are typically used to repair cracks in concrete walls and gutters because they can easily seal the cracks. They function somewhat differently.
Epoxy injections are using a unique resin where two parts are mixed. This resin is then injected into the crack. It adheres strongly to the concrete once it hardens and affixes the crack.
Polyurethane injections use a foam to fill the crack. This foam will expand to fill the crack and will create a watertight seal. Both can repair cracks, but in general epoxy is used for fixing even the strongest of concrete and polyurethane is used to keep the cracks from getting worse as well as to prevent water from coming in.
(Epoxy vs Polyurethane Sealer For Cracks)
Both epoxy and polyurethane products can be good but they can also have downsides.
Pros of Epoxy:
It’s super strong and really hardy.
Once it solidifies, it forms a sturdy seal that can help prevent further cracks.
epoxy grout injection is chemically resistant, and stands up in busy areas.
Cons of Epoxy:
It can be more expensive and take longer than polyurethane.
It may not fit very slender cracks.
Pros of Polyurethane:
It is quick and easy to use.
Open cell expanding foam, depending on its formula, can fill various sizes and types of cracks.
It’s flexible, so it can move with the concrete.
Cons of Polyurethane:
It may not be as durable as injectable epoxy grout.
Where it may not work: For large structural repairs.
The foam can degrade when exposed to sunlight.
Understanding the Differences
There are many factors to consider when deciding how to repair cracks, some of which are discussed here. Epoxy: For a strong repair that requires strength overtime use epoxy. Seal up cracks and don’t let the water in with polyurethane.
When determining whether to use an epoxy injection packers or polyurethane to treat a concrete crack, consider the type of crack and where it is. If the crack is in a high-traffic area or is problematic, epoxy is the other option. And if water is coming through the crack, then polyurethane might be the right material.
