Cork is an excellent thermal, acoustic, and vibration insulator. When transformed into stoppers, its insulation properties contribute to making it the best protection for wine and spirits against temperature variations or contamination and possible negative effects from storage and transport conditions.

How is cork impermeable?

Impermeable: Cork has a magic chemical in its cell membrane that makes it completely impermeable to liquids and gases. This chemical is a mixture of fatty acids and heavy organic alcohol called suberin, which as well as rendering cork impermeable also stops it from rotting or degrading over time.

Is cork flame resistant?

Thanks to the thermal and weak combustion properties of cork, cork oaks are more fire-resistant than other trees. The slow combustion of cork makes it a natural fire retardant, forming a barrier against fires. Its combustion does not release smoke or toxic gases.