How Long Do Polyurethane Fumes Last?

How Long Do Polyurethane Fumes Last? Typically, as he mentioned, “full cure” (hardness) may not be reached for 10-14 days… and the fumes will probably dissipate over the following 10-12 days. The smell can be around for anywhere from 3-6 weeks, however. What happens if you breathe in too much polyurethane? ► Inhaling Urethane can