Attic vent screens are available at GateLatchUSA.com. The company's attic vent screens are made of stainless steel and can serve as replacement screens for bird block holes in attics.
GateLatchUSA.com's attic vent screens are pre-cut and sized for 2- to 2.5-inch diameter holes with a depth of 1.5 inches. The company's attic vent screens are available in kits of 12 to 96 stainless steel screens.
GatchLatchUSA.com recommends using Vulkem polyurethane sealant for proper bonding and installation of the attic vent screens. The company offers 10.1-ounce cartridges of Vulkem in a variety of colors, capable of sealing approximately 32 attic vent screens per cartridge.