resin

She also told the BBC he had encouraged her to smoke what he told her was "tree resin" from a homemade bong.

Glasst, unsurprisingly, declines to share details about how it makes the paint, but Mr Botero says it is a resin from a renewable source.

He mentions that Glasst is working on other coatings with unusual properties – including “Thermglasst”, an insulating resin due to launch next year.

Their serotinous cones, coated in a sticky resin, can’t open and spread their seeds without it.

The scent of copal, a tree resin used by Mesoamerican cultures for spiritual, medicinal and practical rituals, wafts through the space.