Surface tension enables water boatmen to mate and Gutter Gard to work. This remarkable force ensures that liquids adhere to curved surfaces and enables the rainwater that falls onto the surface of the Gutter Guard profile to form into a film that sticks to the special hydrophilic surface to travel around the curved front edge and then back underneath the profile, to cascade into the gutter below. Debris such as fallen leaves, moss and pine needles, that would normally fall inside the open gutter, stay on the smooth surface of the profile, to be blown away by the wind or washed off the front edge during the next heavy downpour.