Bondo to fill in spots on concrete porch

[Higgs Boson]

I am (STILL!!) working on repainting my concrete porch (approx 10x10 + 2 steps).
Scraping off decades of paint is a bitch. Earlier layers oil-based; later ones water-based (California banned oil-based). Uneven wearing. Spots that look like beaches on a lake...various depths.

In past years I used SOMETHING ???? to fill in that did not wear well.

Paint store heard my sad story & said Bondo could be used to fill in low spots.

Bondo possible?

TIA

HB

[dadiOH]

"Higgs Boson" <hypa...@gmail.com> wrote in message
news:508fd79d-454b-4ec4...@googlegroups.com

Of course its possible. I *LOVE* Bondo. But not on a horizontal surface
that is going to get walked on. Unless the spots are really small.

Go rent a floor sander. The big square vibrating ones are easy to use, no
chance of digging divots into the floor.


--

dadiOH
____________________________

Winters getting colder? Tired of the rat race?
Taxes out of hand? Maybe just ready for a change?
Check it out... http://www.floridaloghouse.net

[Oren]

On Tue, 15 Oct 2013 17:20:22 -0400, "dadiOH" <dad...@invalid.com>
wrote:

>Of course its possible. I *LOVE* Bondo. But not on a horizontal surface
>that is going to get walked on. Unless the spots are really small.

Having been directed by her to not reply to her inquiries, I'll just
say Bondo is not the solution on concrete.

I would tell her why, but she demands I don't reply.

[DerbyDad03]

Use DuraGlas

http://www.amazon.com/USC-Duraglas-Fiberglass-Filler-Putty/dp/B003BW9XPW

Bondo makes a filler with fiberglass also, but I've never tried it.

Be prepared for some tough sanding.

[gonjah]

I've used it on my swimming pool deck. It holds up pretty well. I
pressure wash first. I've been considering using an epoxy primer *prior*
to applying.

Bondo does shrink a little and it's not a permanent solution. I use
household Bondo quite a bit. Pretty handy stuff to have around. If that
DuraGlas doesn't shrink it might work better.

[cl...@snyder.on.ca]

On Tue, 15 Oct 2013 17:20:22 -0400, "dadiOH" <dad...@invalid.com>
wrote:

>"Higgs Boson" <hypa...@gmail.com> wrote in message
>news:508fd79d-454b-4ec4...@googlegroups.com
>> I am (STILL!!) working on repainting my concrete porch
>> (approx 10x10 + 2 steps).
>> Scraping off decades of paint is a bitch. Earlier layers
>> oil-based; later ones water-based (California banned
>> oil-based). Uneven wearing. Spots that look like beaches
>> on a lake...various depths.
>>
>> In past years I used SOMETHING ???? to fill in that did
>> not wear well.
>>
>> Paint store heard my sad story & said Bondo could be used
>> to fill in low spots.
>>
>> Bondo possible?
>
>
>Of course its possible. I *LOVE* Bondo. But not on a horizontal surface
>that is going to get walked on. Unless the spots are really small.
>
>Go rent a floor sander. The big square vibrating ones are easy to use, no
>chance of digging divots into the floor.

Concrete is HELL on sandpaper!!!

[Pavel314]

I've used Top'n Bond many times over the years for concrete filling.

Paul

[WW]

"Higgs Boson" wrote in message
news:508fd79d-454b-4ec4...@googlegroups.com...

Cover it with Trex. Future problems solved. WW

[k...@attt.bizz]

She reverse-plonked you? I don't believe I've heard that one.

[DerbyDad03]

There's also Quikrete Concrete Resurfacer. I did my very badly pitted
garage floor with this product a couple of years ago. We don't park any
cars in the garage, so I'm not surprised that it's stood up very well to
foot traffic.

http://www.quikrete.com/productlines/concreteresurfacer.asp

[Nate Nagel]

I don't really like Bondo because it'll suck in water (lots of talc as a
filler)

Alternate idea - heat gun or torch to get *all* the old paint off, then
etch with muriatic acid and paint as per usual?

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel

[Higgs Boson]

Interesting.

The site said "
QUIKRETE® Concrete Resurfacer (No. 1131) is a special blend of portland cement, sand, polymer modifiers and other additives. Designed to provide a shrinkage compensated repair material for making ***thin repairs*** to sound concrete in need of surface renewal. Can be squeegee, trowel or brush applied.

What do you think they mean by "thin repairs". The "leprosy" spots on my concrete porch are mostly *less* than 1" deep. Would the Quikcrete product work?

TIA

HB

[Higgs Boson]

Possible. Up to now, apply Jason, cover, let work, scrape. Takes time and work to clear a 3x3' area. Take forever to do 10x10 plus steps. I don't have very powerful torch, but I guess I could try a small area...

Appreciate all suggestions!

HB

[Higgs Boson]

I LOVE Trex, but never thought of applying it over concrete. Do you know of situations where this has been done? Does it require a "bed" to "nestle" in?
If so, what is advised? What about the steps, risers and treads?

Also: Around the E. and S. sides of the porch, the concrete was evidently poured at a slight angle -- perhaps to facilitate rain runoff?
These areas are about 14" wide, and run the length of the E & S walls - 10' ea.
One would have to cut the Trex separately and butt it into the flat layers, yes?

HB

[Higgs Boson]

On Tuesday, October 15, 2013 7:08:30 PM UTC-7, Nate Nagel wrote:

Nate: Afterthought. Would the Bondo still "suck in water" if covered with 1 coat primer & 2 coats paint? Or do you mean during process of applying Bondo to eroded spots?

HB

[nestork]

cl...@snyder.on.ca;3134473 Wrote:
>
> Concrete is HELL on sandpaper!!!
>

Yes, it might be, but paint isn't.

You move the machine to the left and the right and when you see you're
exposing the concrete, you move on to the next section.

This method is commonly used to sand the polyurethane off of hardwood
floors, and so as long as you don't try to sand the concrete down, it'll
work on a porch.

In fact, one Canadian janitorial equipment manufacturer, Centaur, makes
a floor machine called the "Woodpecker" specifically for sanding the
polyurethane off hardwood floors. It is used along with a vaccuum
cleaner to simultaneously vaccuum up the sanding dust created.

http://tinyurl.com/kth24az

http://tinyurl.com/lh33vur

And besides, at $5 to $15 max for a sanding screen, you can remove a lot
of paint for $10.

You just have to be careful using it on concrete because high
productivity pads are only about half the thickness of a regular floor
machine pad. A person could always use two high productivity pads and a
Big Mouth to hold them concentric.




--
nestork

[cl...@snyder.on.ca]

Gotta be carefull with a torch on conrete though. Too much heat and
you have ANOTHER hole to fill, and concrete bits embedded in your
face/whatever.

[cl...@snyder.on.ca]

You do NOT want to use regular polyester filler on concrete. Epoxy or
vinyl-ester resin and chopped fiberglass might work though.

[cl...@snyder.on.ca]

My Trex front porch is built over the original concrete "stoop", and
extended beyond. Where it is built over the concrete I ran some HDPE
strips over the concrete, and fastened the trex over that.

[dadiOH]

<cl...@snyder.on.ca> wrote in message
news:3ror59h989a3spj2j...@4ax.com

So it is. No idea why I read "concrete" but thought "wood".

[dadiOH]

"Nate Nagel" <njn...@roosters.net> wrote in message
news:l3ksf...@news4.newsguy.com

> On 10/15/2013 07:52 PM, DerbyDad03 wrote:
> > Higgs Boson <hypa...@gmail.com> wrote:
> > > I am (STILL!!) working on repainting my concrete
> > > porch (approx 10x10 + 2 steps). Scraping off decades
> > > of paint is a bitch. Earlier layers oil-based; later ones water-based
> > > (California banned oil-based).
> > > Uneven wearing. Spots that look like beaches on a lake...various
> > > depths. In past years I used SOMETHING ???? to fill in that
> > > did not wear well. Paint store heard my sad story & said Bondo could
> > > be
> > > used to fill in low spots. Bondo possible?
> > >
> > > TIA
> > >
> > > HB
> >
> > Use DuraGlas
> >
> > http://www.amazon.com/USC-Duraglas-Fiberglass-Filler-Putty/dp/B003BW9XPW
> >
> > Bondo makes a filler with fiberglass also, but I've
> > never tried it. Be prepared for some tough sanding.
> >
>
> I don't really like Bondo because it'll suck in water
> (lots of talc as a filler)

Talc is about the most impermeable mineral around. That's why they used
to - maybe still do - use it for chem lab counters.

Used in that manner, there is no need to seal it; in fact, you *CAN'T seal
it, sealer won't penetrate. And yes, I know that people sometimes apply
mineral oil but the oil isn't soaking in, just sits on top and colors the
surface by making it look wet.

[dadiOH]

<cl...@snyder.on.ca> wrote in message
news:rr1s59d027jlv403c...@4ax.com

Or fumed silica (as a filler). Brand names are Cab-o-Sil and Aero-Sil.
Mixed with epoxy to the consistency of Vaseline or peanut butter. Sets up
hard and clear. UV degrades epoxy so needs to be painted.

Good supplier of resins, fillers, etc...
http://www.uscomposites.com/

[Norminn]

Bondo is the last thing I'd use. Warm climate? Cold? Cracks or just
scraggly surface (missing aggregate)? I would not bother scraping off
old paint....pressure wash. If paint is adhering well, sand that.
There is mortar for resurfacing concrete. I've been dabbling with
concrete and mortar lately, making planters and stepping stones for
yard, but no experience patching other that using liquid crack filler.
If I were in a lazy mood, and the suface didn't require structural help
or filling deep defects, I'd use premixed latex stucco patching
stuff...used it on the Florida condo to fill broken c.b. and (as mortar
and stucco) on a hole in wall prior to painting. Worked beautifully,
and lots easier than mixing/cleaning up 'crete.

[Nate Nagel]

Unless perfectly coated, it'll draw damp - and on a concrete slab it
still might from the backside. This I learned from working on old cars
in western PA - any Bondo repair *must* be 100% coated - e.g. if you use
it to fill a pinholed section of metal, unless you paint and put some
tar on the backside of the panel, it'll rust out again faster than if
you'd done nothing at all.

I have no experience using it on concrete, but my spidey sense says that
it might cause the paint to lift due to changing moisture levels.

[Nate Nagel]

True... I'm surprised it's so hard to get the old paint off though.
Last place I lived a hot sunny day would lift big bubbles of paint off
the porch. I would just go out with a scraper and take more off :)
Almost got it clean before I moved...

[bud--]

On 10/15/2013 8:26 PM, Higgs Boson wrote:
> On Tuesday, October 15, 2013 7:06:01 PM UTC-7, DerbyDad03 wrote:
>>
>>
>> There's also Quikrete Concrete Resurfacer. I did my very badly pitted
>> garage floor with this product a couple of years ago. We don't park any
>> cars in the garage, so I'm not surprised that it's stood up very well to
>> foot traffic.
>>
>>
>> http://www.quikrete.com/productlines/concreteresurfacer.asp
>
> Interesting.
>
> The site said "

> QUIKRETE� Concrete Resurfacer (No. 1131) is a special blend of portland cement, sand, polymer modifiers and other additives. Designed to provide a shrinkage compensated repair material for making ***thin repairs*** to sound concrete in need of surface renewal. Can be squeegee, trowel or brush applied.

>
> What do you think they mean by "thin repairs". The "leprosy" spots on my concrete porch are mostly *less* than 1" deep. Would the Quikcrete product work?
>

Clicking on "Data Sheet" gives:
http://www.quikrete.com/PDFs/DATA_SHEET-Concrete%20Resurfacer%201131-40.pdf

Which says:
"Build up to the desired thickness using successive 1/8� layers."

One of the major problems patching concrete is bonding to the original
concrete. That is probably what the "polymer modifiers" are for. I did
not read the instructions carefully, but I assume you want clean
concrete, and a rough surface may help.

This stuff sounds better than bondo and other ideas to me.

[Oren]

On Tue, 15 Oct 2013 21:57:16 -0400, k...@attt.bizz wrote:

>She reverse-plonked you? I don't believe I've heard that one.

I out flanked the pincer movement :)

[fineline...@gmail.com]

What about the shine

[Gordon Shumway]

On Sun, 26 Feb 2017 14:21:41 -0800 (PST), fineline...@gmail.com wrote:

>What about the shine

Well that was sure racist!

[Oren]

On Sun, 26 Feb 2017 14:21:41 -0800 (PST), fineline...@gmail.com
wrote:

>What about the shine

<https://www.youtube.com/watch?v=qKLPj6YBFM4>