Mastic 1) an aromatic gum or resin that exudes from the bark of a Mediterranean tree, used in making varnish and chewing gum and as a flavouring; 2) a material of relatively viscous, paste-like consistency that can be poured when heated but often requires mechanical manipulation to apply, which dries or cures to form a thick protective coating.
Mastic
Posted in Substance and tagged petrochemical.
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