HY-C provides property protection with our quality animal control & exclusion guards, screens and chimney covers. Chimneys and roof vents are convenient "doors" for raccoons, birds and other nuisance wildlife to enter and damage homes. Our products protect vents, preventing damage from pest, wildlife, falling debris and weather. HY-C has been providing safety, security and sustainable living products since 1947. And we manufacture almost all of our products here in the United States.