The word 'impermeable' is correct and can be used in written English.
You can use it to describe something that is not able to permeate, or pass through something. For example, you could say: "This material is impermeable, so it will protect us from the rain."
The story shifts to the US and centres on the surviving brother, who has married his brother's wife, each living fractured lives within impermeable carapaces.
This process uses water, sand and chemicals under pressure, together with horizontal drilling through the shale beds, to release vast quantities of gas and oil from impermeable rocks that are deep underground.The book's main strength is the clarity with which the author explains the development of shale exploitation and assesses the implications of the shale boom.
A century of data collected by oil companies suggest it is impermeable rocks such as granite that are the most effective reservoirs of heat.
The intifada years, between 1988 and 1991, when the nightly doses of televised repression were confined to the occupied territories, helped nurture a comforting confidence that the "green line" border was somehow impermeable.
Others blame urbanisation, because growing cities need more asphalt and other impermeable surfaces which will not absorb water that would once have soaked into the soil.
This employs high-pressure pumps to force the water from brine through a membrane that is impermeable to salt.
By contrast, oil flows much more sluggishly through impermeable tight rock.
However, a fully impermeable blockade cannot be imposed without first securing the authority of the UN Security Council.More important, the summit failed to produce the endorsement for a ground intervention in Kosovo which had been advocated by Britain.
The seta contains chlorophyll when immature and cannot absorb moisture from the environment because its surface is covered by a water-impermeable layer, the cuticle.
The endodermis (the innermost layer of the cortex adjacent to the pericycle) is composed of closely packed cells that have within their walls Casparian strips, water-impermeable deposits of suberin that regulate water and mineral uptake by the roots.
Prevention of rising damp is sometimes achieved by cutting into the wall beneath the mural and inserting a "damp course" of water-impermeable material or a high capillary tube that draws and deflects the harmful accumulation (see Architecture, above).
