Can you tell me what this is? (new home owner here)
It's a sealed spot on the side of the house that has red powder in it:
What would I use to seal that back up?
The red powder irritates my hands when I touched it.
You likely will need more help than you can get in a newsgroup. Take a
photo and a sample to your local building inspector and if he can't
identify it, then ask the chemists at a local college for help. The
fact that it appears to be an irritant means you should use common
sense, like wearing laex gloves and a respirator. With luck, it may
turn out to be totally innocuous and the fix could be use a shop vac
to get the powder out, then fill the opening with mortar or an
appropriate filler for the structure.
Whatever , it looks like something unique HTH
That looks like a plug on a drain or vent line. What is on the other side?
Could be a disconnected pipe and the residue is leaking. Buildup of
chemicals from water, buildup of residue from a drain line. Follow the pipe
and let us know what you find. If the plug is leaking, it may just need
some Teflon tape.
Could that be well rusted steel wool?
Maybe the steel wool was stuffed around the cleanout to keep mice/rats
out of the house and then caulked/painted over and
has since rusted. Can you get to the other side of the wall?
Looks like a clean-out plug surrounded by normal, or somewhat degraded
fibreglas wall insulation, then sloppily painted over with spraypaint.
Fibreglas can be itchy and irritating to skin.
It would be normal for your walls to be filled with this material.
Take a utility knife and cut away all the caulk and paint, back to the fresh
cement board, then pull out the old insulation.
Use that spray insulation in a can, like Handi-Foam, to re-fill the void
(fibreglas is not weather resistant), let dry awhile, trim back to 1/4 inch
below your hardiboard siding, then finish by troweling on a good paintable
white silicone seal/adhesive. Next day, paint to match house.
Mostly false. Long term exposure to most any particulate is bad, short
term is generally not an issue. Inhaling a few fiberglass particles can
certainly cause some irritation, but the body will purge out the
particles after a short while. Asbestos particles don't get purged which
is one of the reasons they are a problem.
It looks like partially discolored fiberglass insulation.
Looks like someone punched a too big hole in the wall to put in a
cleanout, stuffed insulation around it and then slathered over with a
now disintegrating caulk. It is a hack job, bet the previous home
owner fancied himself as a skilled do-it-yourselfer.
How to fix it depends on what the wall material is. What is it? It
would be nice if the cleanout pipe/plug extended an inch or so beyond
the wall so a close fitting escutcheon could be fitted around it.
My guess would be the powder is disintegrated insulation. Clean out the
existing caulk. Use some Bondo household putty (Lowes or Homedepot carry it
in the paint department) to cover the large voids. Be careful to maintain
the angle of your siding when repairing with the Bondo. Don't apply the
Bondo directly to the pipe as you need an expansion joint between the siding
and the pipe. Maintain at least a 1/4" gap between the two. Fill in the gap
with good caulk and then paint. You'll probably find all sorts of stuff like
this in your new house if the previous homeowners did their own repairs.
It's amazing what some people will do when repairing their houses. Every
time I repair a job done by the previous owner of my house I have a good
chuckle. And the previous owner worked at Homedepot!
Fortunately for us you can repair almost anything like this with Bondo.
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