My old car had leaked oil on the driveway over a period of 2 yrs. How
do i remove the oil stains without getting a costly power washer? Are
there household detergents or solvents i can use. The stain is about 3
long and 2 feet wide. Thanks.
Wait for some dry days, then:
First spread 1/2 inch of cat litter (clay granule type) or special litter
sold at auto parts stores, over the stain, then walk around on it to pound
it fine. A tamper or other heavy flat tool may be used to crush the litter,
so fine material filters down to the oil. Once crushed down, let it sit for
several days to a week. Sweep up the litter, and apply again if some oil is
still left. For the remainder, I either use a power washer or waste paint
thinner to dissolve the residue, then apply more litter to soak the
now-thinned oil up. A stiff brush and dish detergent and warm water can get
the oil/thinner film off the concrete.
On Jan 8, 12:53 am, "Roger Taylor" <sherryrogeratcomcastdotnet> wrote:
A minor change to the recommendation above. Spread a thin layer of
kitty litter (just enough to cover the stain area). Then take a brick
and grind the clay HARD into the stain. The more hand pressure, the
better. With a stain this size, it may take abit of time. But this
gets the clay ground up into fine dust and pushed into the itty bitty
pores of the concrete. Let stand...at least for a few days so don't
so this when rain is expected. Either let it blow away on its own or
sweep up after a few days. The stain will be almost gone.
There was a thread about this a little while ago where the recommendation
was to use thinner, then cover the thinner with the kitty litter. I
followed this rec and it worked, although I had to do it a couple of times.
"Roger Taylor" <sherryrogeratcomcastdotnet> wrote in message
I had some oil in my concrete basement floor. I removed most of it, it
is better but not all gone, by using a concrete stain remover.
It came in a jug and is a viscous liquid. Pour on the floor and let it
dry. It sort of sucks out the oil. Then scrape off the dry material
which has absorbed the oil. Drying time is I think overnight.
I got the stuff from Home Depot, but the name escapes me.
Get engine cleaner at any auto parts store, Gunk is a common brand. Spray it on
the stains, let sit for awhile then wire brush. It will now wash off with
water, or you can cover it with kitty litter and soak it up.
For spills, Costco sell large buckets of laundry detergent for
about $12 that will do a great job. Directions for use are
printed right on the bucket.
For 2 year old stains... you're going to have a really hard
time. I'm not sure you'll ever get rid of them completely.
And be careful with solvents -- aside from the safety issues
you might find they just spread the stain and make matters
Fix the car and wait 5 years for the rain, snow, and sunlight
to do their thing... very inexpensive ;-)
| Malcolm Hoar "The more I practice, the luckier I get". |
See JohnnyC's post. I make a poultice from kitty litter and
mineral spirits/paint thinner; spread over the stain (~1/4 inch
thick); then sweep up the oil and litter when it dries. I will
position a fan to blow over the surface of the poultice to speed
things up if conditions warrant.
This is somewhat dangerous (flammability problem) so make certain the
vapors can't collect in enclosed spaces.
It also helps to put dry kitty litter at the edges to collect any
seepage which might spread some of the stain.
Mineral spirits/paint thinner work better on oil stains. I have used
acetone (very, very flammable, and toxic) on transmission fluid
I tried the kitty litter with little success. I tried some grease
remover with little success. The fact that it has been sitting for 2
yrs is probably why. Is it possible to use bleach to at least get the
dark stains out. I believe that if i use bleach at least the dark
stains will be gone, though i do think discoloration will occur, but i
can deal with that later. I just need to show some improvement. The
only thing i need to know is if bleaching will remove or destroy the
concrete itself. Thanks.
Bleach will have no effect on oil. Use a solvent like the commercial
ones recommended by other posters, or just use paint thinner.
1. Scrape off anything solid with a putty knife.
2. Scrub what's left with a wire brush and dishwasher detergent. Blot it
up with paper towels and wash it off. Keep the mess off the grass if you
want to keep your grass.
3. Now scrub with solvent and wire brush. Blot again.
4. Put on lots of solvent and kitty litter. Let it sit a few days. Sweep
it up and do it again. And again. And yet again. It may take 20 repeats.
The commercial products have pretty much the same ingredients as paint
thinner, but they are thickened to keep it from running off and
evaporating too fast. I've had good luck with the jelly-type paint
strippers. Don't get them on your skin or breathe the fumes. You need to
keep your liver.
There are cleaners available at the home centers specifically made to
remove oil form concrete and similar. Look in the sections where
they sell driveway sealer products, paints, and concrete products.
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