How does a waterproofing agent work ? - Vidyadip

Question

How does a waterproofing agent work ?

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Answer

Wettability of a surface, and thus its propensity for penetration of water, depends upon the affinity between the water and the surface. A liquid wets a surface when its contact angle with the surface is acute. A waterproofing coating has angle of contact obtuse and thus makes the surface hydrophobic.

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