Bricks, Masonry, Asphalt and Concrete - Sealing hole in exterior wall

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hfx_chris
05-23-08, 06:04 PM
Not sure which forum to post this in. I have a heat pump, and the hole in the exterior wall where the pipe and electrical cables go through was originally sealed with this black putty-like material. I have no idea exactly what it is, but 23 years later it's starting to crack and fall apart, so I need to re-seal it.
Should I use the same stuff, and if so what exactly is it - or is there something better I should get? I was thinking about that expanding foam stuff, but I don't know if that's recommended for this or not...
The house has vinyl siding. Thanks!