what is mastic in construction?
<answer> Mastic is a resin obtained from the mastic tree. <context> Mastic (plant resin) Page issues. Mastic tears. Mastic (Greek: μαστίχα) is a resin obtained from the mastic tree (Pistacia lentiscus). In pharmacies and nature shops, it is called Arabic gum (not to be confused with gum arabic) and Yemen gum.