Knowledge Gaps Regarding the Hygrothermal and Long-Term Performance of Aerogel-Based Coating Mortars

•Documented trial mixtures and commercial aerogel-based plasters are reviewed.•Available hygrothermal and mechanical properties are incomplete for risk assessments.•Explorative long-term durability performance exists only for trial mixtures.•Full-scale applications of commercial products are significant but of local value.•More research on the compatibility of aerogel-based plasters with other materials is needed.