Water entering home through hole in exterior wall

[Horseless Carriage]

The last time it rained real hard (flood warnings all throughout my area, cars having to be towed out of standing water in my county), a little bit of water entered my home. I actually thought it was the washing machine leaking, and the washing machine repairman came out and said nope, it's not leaking. Then I opened the door to the room adjacent to the utility room, and found a little bit of water in there too. So I walked around the outside of my home, and looked along the exterior wall to try and see if I could figure out where that water might have come from. And here's my best guess, a big crack where the big old electrical cable from the meter comes into the house. I think it might have rained through this big crack.


Now here's what this same area looks like on my neighbor's house. Nice and sealed, looks like.


I think that goop might be this stuff, but I don't know. I'm not very handy. Should I buy that stuff from Lowes and fill the crack with it, or is doing so liable to get me electrocuted, and I should hire a handyman instead?

 

[Smooky]

You need caulk and a caulking gun to put it in the hole. Then use a wet finger to smooth it out.

http://www.lowes.com/Search=caulk?s...catalogId=10051&N=0&newSearch=true&Ntt=caulk#!

http://www.lowes.com/pd_43465-16878...&pl=1&currentURL=?Ntt=caulking+gun&facetInfo=

https://www.youtube.com/watch?v=IAWXGGZUhg0

 

[Sponsor]

 

[Horseless Carriage]

The hole is around an inch wide at its widest point, I believe. Isn't that too big for caulk?

 

[JerryR]

That area needs to be sealed to prevent water intrusion.

If I were you I'd buy a tube of silicon sealant that does not require a caulking gun like this
http://www.lowes.com/pd_17417-72643...l=1&currentURL=?Ntt=silicone+caulk&facetInfo=