Impervious


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impervious

[im′pər·vē·əs]
(science and technology)

Impervious

Resistant to water.

impervious

In ceramics, that degree of vitrification evidenced visually by complete resistance to dye penetration; generally signifies zero absorption of water, except for floor and wall tile, which may absorb up to 0.5% water.
References in periodicals archive ?
One argument against pervious surfaces in high-traffic areas is that they're not as durable as their impervious ancestors.
2]--an area a bit smaller than the state of Ohio--are covered with impervious surfaces.
The storm water drainage bill is calculated by mapping the impervious areas -- or surfaces that water does not penetrate, such as concrete and asphalt -- contained within a parcel.
When impervious surfaces expand, tree cover needs to expand to compensate.
But 95 percent of the Navy Yard's 65 acres is covered with impervious material--rooftops and parking lots.
An abstract painter who became known in the early '80s for her large-scale, gestural paintings on unorthodox surfaces such as vinyl and aluminum, Mika Yoshizawa has continue to refine her vocabulary with an uncommon singularity of purpose, seemingly impervious to the vagaries of the art world.
For unlike any other retail strip in the city, it has proven itself virtually impervious to the cyclical, and often painful, fluctuations in the real estate market.
The article comprises a liquid impervious backing sheet, a liquid pervious bodyside liner and an absorbent material between the liquid pervious bodyside liner and the liquid impervious backing sheet.
The holidays are a notoriously bad time to sell homes, but Santa Clarita remained impervious to the usual November and December slump, officials said.
These so-called superwinds would have had no effect on dark matter, which is impervious to everything but gravity.
Impervious to moisture and completely waterproof, NeoFloor's backing system consists of five layers: an ultra-dense cut pile decorative layer; a vinyl moisture barrier precoated with an antimicrobial treatment; a reinforced fiberglass scrim to ensure dimensional stability; a vinyl closed-cell, cushioned moisture-barrier backing; and a vinyl adhesive to protect subfloor and prevent delamination.