From the Familyhandyman.com
Fill gaps under sinks
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| Seal gaps around plumbing pipes Squirt expanding foam around the pipes inside the wall. Pull back the escutcheons on plumbing pipes where they enter exterior walls and you'll probably see generous gaps around the pipes. In cold weather, you might also feel the draft coming in. All it takes is some $7-a-can expanding foam to seal those leaks. Shake the can vigorously, then squirt the foam around the pipes inside the wall. Don't completely fill the gap—the foam will expand. If it expands too much and you can’t get the escutcheon back on, wait for it to dry, then slice it flush with the wall with a utility knife. |
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