HMI

09/07/2026

09/04/2026

When it comes to polyurethane foam, reaction speed can affect how far the material travels beneath the slab before it builds structure.

Knowing the difference can help you choose the right foam for the job.

Read the full breakdown here: https://hmicompany.com/reaction-speed-vs-spread-why-it-matters-in-concrete-lifting

09/02/2026

🟥Old pipe stays. New liner goes in. FillFoam™ fills the gap.🟥

During a storm pipe rehab project, a new liner was installed inside an existing deteriorated concrete pipe—leaving an irregular void that needed to be filled.

FillFoam™ was produced onsite and pumped through approximately 40 feet of annular space to support the new liner and fill the void—all without tearing out the existing pipe.

Another way FillFoam™ can tackle the spaces conventional fill can’t easily reach.

🟥Check out the full case study:
https://hmicompany.com/learning-resources/case-studies/fillfoam-used-for-storm-pipe-annular-grouting/

08/31/2026

The foam that expands the most isn’t always the best foam for the job.

More expansion can mean more yield and less material used. But depending on the job, you may need more cured density and strength instead.

It’s not about getting the most expansion. It’s about getting the right foam for the job.

See how expansion, yield, density, and strength work together.

Learn why more polyurethane foam expansion can improve yield but also changes cured density and strength, and why the right balance matters in concrete lifting.

08/28/2026

More expansion = better foam? Not always.

Higher expansion can mean better yield and less material used, but there’s more to choosing the right foam for the job.

Expansion, cured density, and compressive strength all play a part.

Watch our quick breakdown ⬇️

More expansion can mean better yield and lower material usage—but t...

08/25/2026

More sheet pile contractors are bringing chemical grouting in house.

That means more of the job stays with your crew and more of the revenue stays with your business.

HMI can help you get set up with the equipment, materials, training, and support to do it.

08/21/2026

What does 10x expansion actually mean?

When you’re pumping polyurethane, expansion affects yield, material usage, and ultimately your job costs.

In our latest blog we break down:
▪️ What foam expansion actually means
▪️ How expansion relates to yield
▪️ Why it matters when estimating jobs

Know your foam. Know your numbers. Make better decisions on the job.

Check out the blog:

At its simplest, expansion describes how much the polyurethane increases in volume as the liquid components react and become foam. For contractors, that matters because expansion directly affects how much finished foam can be produced from the material being pumped.

08/19/2026

◼️What if your next big opportunity is below the surface?◼️

Join HMI for our 2-Day Soil Improvement Seminar and learn how to confidently tackle soil improvement projects with hands-on training and guidance from industry professionals, including licensed Geotechnical Engineers.

▪️Hands-on demonstrations
▪️Learn how to design & bid projects
▪️ Real-world applications & business opportunities

Don’t just walk away knowing more. Walk away ready to do more.

Ready to add soil improvement to your capabilities? Secure your spot:
https://hmicompany.com/training-support/soil-improvement-seminar/

08/18/2026

Why tear it out if you can lift it?
Settled concrete doesn’t always need a full replacement. With polyurethane concrete lifting, you can raise and stabilize existing slabs with less mess and disruption.

The process is straightforward: Drill. Pump. Patch. But getting the lift right comes down to knowing where to drill, how much material to inject, and when to stop.

🟥Watch it here: https://www.youtube.com/watch?v=KrkkLOeSFwM

Looking to add concrete lifting to the work you already do? We can help with the equipment, material, training, and support to get you up and running.

Have settled or uneven concrete? Before tearing it out and replacin...

08/13/2026

Why so many different foam densities?

Because a sidewalk and a highway aren’t the same job.

Sure, 2 lb foam can lift concrete. But lifting the slab is only part of the job. What that foam needs to handle after it cures matters too.

That’s where different densities come in.

Higher density doesn’t automatically mean better. It means you’ve got another tool in the toolbox.

We break it down here:

Learn why polyurethane foams come in different densities and how contractors match foam density to the demands of residential, commercial, industrial, and infrastructure concrete lifting projects.