BIRDS CANT STAND THEIR "LANDING STRIP" WHEN YOUVE APPLIED.... BIRD-X BIRD-PROOF Gel Repellent Keep birds off their normal roosting areas with an application of BIRD-PROOF, a non-toxic, sticky chemical that makes a surface tacky and uncomfortable to birds. Birds avoid BIRD-PROOF like humans avoid wet tar. PROTECT YOUR PROPERTY FOR A FULL YEAR OR LONGER! Its non-toxic, and harmless to metal structures, sealed masonry and ornamental metals. APPLY WITH A STANDARD 10" CAULKING GUN! Ledges, windowsills, gutters, cornices, ornamental copings and protruding beams - any surface where birds roost or perch. USE IN ANY WEATHER, INDOORS OR OUTDOORS, LITERALLY ANYWHERE For best results drop a cartridge of Bird-Proof Gel in a standard 10" caulking gun and apply to ledges, windowsills, gutters, cornices, ornamental copings and protruding beams-any surface where birds roost or perch Application Coverage Area: Case of Twelve 10.5 oz. cartridges treats 120 linear feet.