Yes, epoxy and polyaspartic coatings do have an odor during application, and it can be noticeable for the first day or two while everything cures. Polyaspartic topcoats generally off-gas faster than traditional epoxy, which is part of why professional installers favor them for occupied garages. Good ventilation during and after application makes a real difference, and most of the strongest odor is gone within 24 to 48 hours. It’s not something you need a respirator for as a homeowner walking past, but if you’re sensitive to strong smells, keeping the garage door open and avoiding the space for the first day is a reasonable precaution.
We can also talk through timing your installation for when it works best for your household. See our St. Louis epoxy flooring services for details on the process.