“…These substances are multifunctional materials that were used since Prehistory for their adhesive and hydrophobic properties, among other things (Table S1). In the archaeological record, they are usually discovered as elements used to haft tools or to mend ceramic vessels, as waterproofing agents (Aveling and Heron, 1998a;Bonfield et al, 1997;Connan, 1999;Connan and Van de Velde, 2010;Evans and Heron, 1993;Langlois et al, 2005;Mitkidou et al, 2008;Regert, 2001;Regert, 2004;, or even as aesthetic components of various objects (including for colour) (Bosquet et al, 2001;Connan et al, 2004;Regert et al, 2019;Sauter et al, 2002;Urem-Kotsou et al, 2018). Plant exudates and tars may also have been employed in medicinal practices, such as dental care (Aveling and Heron, 1999;Evans and Heron, 1993;Stern et al, 2006), or used for their odoriferous properties (Lucquin et al, 2007;Marangou and Stern, 2009;Mathe et al, 2004;Stern et al, 2003).…”