Filling hole in bricks around A/C lines?

[1carcrazyguy]

Trying to decide the correct way to tackle this. When the A/C was replaced in this house they did not finish sealing the brick around the A/C lines. Should I fill it with concrete or should I use expandable foam first and just a thin exterior coat of concrete? Any other ideas? There is about a 4 inch space, all the the way around the lines, to fill.

[lincolnboy]

I'd stuff it with fire caulking.

X2. Let the ol' lady see you hold your caulk and shoot it on the wall.

[ceyko]

Spray foam is not bad either, can be trimmed and painted as well.

[black2002ls]

I wouldn't caulk a 4" gap. That is excessive. I would mortar it.

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[lincolnboy]

Just for a fast and easy way caulk would be it and some backer rods. Cemete caulk. But to each their own

[zora04]

P226

[1carcrazyguy]

Ended up fire blocking the air space behind the brick. Then used a spare brick to make fillers for each side and small pieces around the top of the lines. Filled the areas around each of those pieces with concrete caulk.