A rain gutter that leaks is about as useful as a wooden nickel. Now you can seal even the smallest holes and seams with OSI's new Pro-Series Micro Gutter Sealant. According to the manufacturer, the substance has great stretch and adhesion, and sticks to both wet and dry surfaces. A 7-ounce squeeze tube sells for $4. OSI Sealants, 888/445-0208, www.osiproseries.com

Of the dozens of methods I've seen for keeping leaves and other debris out of gutters, the Leaf Defier strikes me as one of the most promising. This UV-stabilized foam insert — treated with a fungicide and biocide to prevent mold, fungus, algae, and moss — fills the gutter, preventing leaves from getting inside. On new installations, the foam...

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