**4. Conclusions**

The following conclusions could be drawn from the research.

• The addition of hydroxyethyl methyl cellulose influences the setting processes of cement and cement-lime mortars. The addition of HEMC with a viscosity of 25,000 mPa·s in the amount of 0.3% significantly delays the setting process regardless of the type of binder (cement, hydrated lime), which is not so visible in the case of the admixture in the amount of 0.05%.


**Author Contributions:** Conceptualization, E.S. Methodology, E.S. and P.C. Validation, E.S. and P.C. Formal analysis, E.S. and P.C. Investigation, E.S. and P.C. Resources, E.S. Data curation, E.S. and P.C. Writing—original draft preparation, E.S. and P.C. Writing—review and editing, E.S. and P.C. Visualization, E.S and P.C. Supervision, E.S. Project administration, E.S. Funding acquisition, E.S. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** This research was funded by the Kielce University of Technology research program number 02.0.05.00/2.01.01.00.0000 SUBB.BKTO.20.002.

**Conflicts of Interest:** The authors declare no conflict of interest.
