How To Seal Around Exterior Pipes?


Use a combination of foam sealant and cement stucco to fill large gaps and voids. Fill larger voids with the foam sealant, then apply the cement to provide a natural finish to the surface surrounding the pipes.

Tyvek® FlexWrap Tape: Sealing pipe penetrations in walls faster and tighter

Selecting and installing the MetraSeal wall penetration seal around pipe

Exterior Penetrations

Frequently Asked Questions

How do you seal a pipe through siding?

Spread silicone on all four sides of the hole and at the slit at the bottom to completely seal the edges (Photo 3). You may need to tape the rubber to the siding temporarily until the caulk dries. Let the caulk dry overnight, then partially fill the boot with foam; seal the hole from the inside as well.

Can you use plumbers putty outdoors?

In addition to its use as a non-staining plumbers putty Sta Put Ultra can also be used as a permanently soft and flexible non-pressurized water, air or gas sealant in gaps around wires, pipes, or vents. The sealant can be used indoors or outdoors, is weather tight, and also resistant to vegetable and petroleum oils.

What is the best way to seal the hole around air conditioning pipes coming into the house from an external air conditioner )?

Use the wall-sleeving the AC manufacturer recommends, and that integrates with line-hide channels. Use building foam once the install is permanent and make a rodent and insect tight seal.

How can I seal a hole in my siding?

Pry out old putty and caulk from around the pipes and wires. Photo 2: Trim the rubber boot. Cut the rubber plumbing boot to fit on top of the siding and around the hole. Photo 3: Mount the boot. Fit the plumbing boot over the pipes, then glue it to the siding with 100 percent silicone caulk. Photo 4: Foam the inside.

What can I use to fill in gaps in my pipes?

Spray GREAT STUFF into the gaps around your pipes. Do not overfill as GREAT STUFF expands as it cures. Keep a wet wipe or paper towel nearby to wipe off the nozzle and wipe up any drips. Once the GREAT STUFF has cured, trim off any excess with a serrated blade if necessary.

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