Water resistance may refer to: The WR mark on a wristwatch indicating its ability to withstand exposure to water The IP code on a mechanical or electrical enclosure indicating its ability to resist the ingress of water Wet strength, a measure of the strength of paper when wet Waterproofing, making objects or structures resist the ingress of water under specified conditions Fluid resistance, drag in water Lotus effect (water-resistance in plant leaves) The electrical resistivity of water (0.2 Ω·m sea water, 2 to 200 Ω·m drinking water, 180000 Ω·m deionized water at 20°C) See also: Hydrophobe Superhydrophobe