How Long will a Critter Quitter Last

A Critter Quitter is made of UV Stabalized Polypropolene. The plastic itself will last decades. However, after about 10 years the black color will begin to fade a bit, by 25 years it will be a dull grey to translucent white. But 25 years is a long time, and the actual vent shield will still work. At that point go buy another one, that’s a pretty inexpensive product over 25 years of service.