These half round Filter Flow gutter guards are a polyether foam filter insert that prevents leaves, pine needles and large debris from clogging a gutter system.Leaves and debris slide off the surface or just dry up and blow away.

Filter Flow has a Proprietary Coating Process that has aUV stabilizer that prevents degradation from the sun. It includes a germicide that inhibits the growth of mold, mildew, fungus, algae and moss. It also prevents mosquitoes, wasps bees and other insects from breeding in the gutter.

Filter Flow works on all roof types and with virtually all of the different gutter hanging systems and has a 5 year warranty.