Water resistance

• 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