Low-priced stock that sells at less than $1.00 per share. Often highly-speculative and volatile, such as start-up mining companies. While, in general, penny stock are considered high-risk securities, some penny stock mature into less-speculative investments. All penny stock are traded over-the-counter.
In its natural form, cork is also a very good fire retardant, although cork dust is actually extremely flammable (because here the cell structure has been broken down). Impermeable: Cork has a magic chemical in its cell membrane that makes it completely impermeable to liquids and gases.
What about Cork and Water? Cork does not absorb water or liquids which is why it's been used for centuries to float fishermen's nets and as stoppers for wine bottles. Finished cork glue-down tiles are great for kitchens and baths and Globus Cork will not stain as it has several coats of finish on it.