Urethane Mortar vs. Standard Epoxy

[Minh Quý Phạm]

"I’m interested in hearing some field experience regarding extreme-duty environments—specifically food processing and commercial kitchens.

We’ve been leaning heavily into trowel-applied polyurethane mortar systems for these areas because of their thermal shock resistance. Are any of you still finding success with high-build epoxies in these high-heat or wash-down areas, or is the industry consensus moving strictly toward mortar? Let's discuss what’s working best for your high-impact projects."

[Minh Quý Phạm]

Great question. We’ve been tracking this closely in the GTA, especially with the increased regulatory focus on food-safe environments.

For standard foot traffic or dry commercial storage, high-build epoxies are excellent and cost-effective. However, for any environment involving wash-down cycles, extreme temperature fluctuations (like freezer-to-ambient transitions), or heavy impact, we’ve found that moving to trowel-applied polyurethane mortar is essentially non-negotiable for longevity.

The main difference we see in the field is the coefficient of thermal expansion; urethane mortar moves with the concrete slab during temp shifts, whereas epoxy can crack or delaminate under that same stress.

We actually put together a quick technical breakdown on our site comparing the two systems and where to apply each based on typical industrial traffic patterns here in Ontario: https://aklevelandpolish.com/industrial-flooring-systems

For those of you shifting toward mortar, are you still using a primer coat, or are you opting for a direct-to-slab application to save on cycle time? Would love to hear your thoughts on the adhesion results

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