What to use to seal around outside pipes?

How to Air Seal Holes around Plumbing

1. Use caulk or canned spray foam to seal piping holes through the top plates, bottom plates, rim joists, and subfloor.
2. For faucet pipes through exterior walls, install a rubber gasket or flashing around the pipe on the exterior wall, if possible, in addition to caulking.

How do you seal copper pipes?

Silicone. Silicone is the type of caulking that seals metal surfaces, such as copper. Silicone caulking comes in a variety of strengths. One hundred percent silicone caulking works well for most applications involving copper, including those that sustain high heat, such as flashing around chimney outlets.

Can you use spray foam around copper pipes?

Don’t use spray foam such as Great Stuff around heat sources: it will melt and produce toxic fumes. BTW, the reason the holes are so big is probably because there used to be three-inch pipes there.

How do you seal an outside hole?

How To Seal the Exterior of Your Home to Keep Pests Out

1. Step 1: Walk Around Your Home and Identify Problem Areas.
2. Step 2: Use caulk to seal small cracks.
3. Step 3: Fill larger gaps with steel wool and foam.
4. Step 4: Use fine wire mesh to cover large openings.

Is expanding foam OK around copper pipe?

It certainly won’t cause any issues with the copper, so don’t worry about that. Possibly the heat from the hot pipe will degrade the (some) foam immediately in contact with it, but actually I think even that is very unlikely. (A hot ‘cylinder’ is effectively a big copper tank covered in exp foam!)

What kind of caulking do I use outside?

Exterior silicone caulk
Exterior silicone caulk is the most commonly used type of exterior caulk because of its incredible durability and water resistance. Silicone is also a very flexible material, even after it has cured, making it an ideal option for sealing drafty windows and doors.

How do I seal the outside of my house?

Fill small holes with steel wool. Put caulk around the steel wool to keep it in place. Use lath screen or lath metal, cement, hardware cloth, or metal sheeting to fix large holes. These materials can be found at your local hardware store.

How do you seal an outside wall pipe?

Load a caulk gun with exterior grade caulking. Acrylic and latex-based caulking designed for exterior applications are ideal for sealing gaps 1/2 inch and smaller around the perimeter of a pipe. Apply an even bead or cord of caulking material around the perimeter of the pipe. Wipe the caulking smooth with your finger.