MICE & RODENT CONTROL

[dieselguy]

I don't remember the brand, but I've seen the black foam sealant like is used by the factory under our fivers at Menard's or Home Depot. I just use Gorilla tape on the belly pan around any gaps like around the spring mounts and plumbing. If you're talking about the water heater exhaust door, I'd suggest just buying the stainless steel formed screen ... aluminum won't last. If you're talking about the door over the hot water heater itself ... I'd imagine regular screen would work.