Poulticing Lubricating And Petroleum Oil Stains From Concrete
- Procedure code:
- Hstrc Concrete: Investigation & Rpr/Pre-Conf Training - 1989
- Concrete Cleaning
- Last Modified:
POULTICING LUBRICATING AND PETROLEUM OIL STAINS FROM CONCRETE
THE CLEANING OR REMOVAL OF STAINS FROM CONCRETE MAY INVOLVE THE USE OF LIQUIDS WHICH MAY RUN OFF ON ADJACENT MATERIAL, DISCOLOR THE CONCRETE OR DRIVE THE STAINS DEEPER INTO POROUS CONCRETE. USE THE PRODUCTS AND TECHNIQUES DESCRIBED HERE ONLY FOR THE COMBINATIONS OF DIRT/STAIN AND CONCRETE SPECIFIED.
SOME SPECIFIED CHEMICALS MAY NOT BE PERMITTED OR APPROPRIATE FOR ALL LOCATIONS. REVIEW MANUFACTURER CAUTIONS AND FEDERAL AND STATE ENVIRONMENTAL REQUIREMENTS. TEST MILDER FORMULATIONS FOR EFFECTIVENESS BEFORE PROCEEDING TO STRONGER CLEANERS.
A. This procedure includes guidance on removing oil stains
such as lubricating and petroleum oil from concrete using
chemical solvents in poultices and bandages. Four
different methods are described.
B. Safety Precautions:
1. DO NOT save unused portions of stain-removal
2. DO NOT store any chemicals in unmarked containers.
3. EXCELLENT VENTILATION MUST BE PROVIDED WHEREVER ANY
SOLVENT IS USED. USE RESPIRATORS WITH SOLVENT
4. No use of organic solvents indoors should be
allowed without substantial air movement. Use only
spark-proof fans near operations involving
5. Provide adequate clothing and protective gear where
the chemicals are indicated to be dangerous.
6. Have available antidote and accident treatment
chemicals where noted.
C. See 01100-07-S for general project guidelines to be
reviewed along with this procedure. These guidelines
cover the following sections:
1. Safety Precautions
2. Historic Structures Precautions
4. Quality Assurance
5. Delivery, Storage and Handling
6. Project/Site Conditions
7. Sequencing and Scheduling
8. General Protection (Surface and Surrounding)
A. Diedrich Technologies, Inc.
7373 S. 6th Street
Oak, Creek, WI 53154
B. ProSoCo, Inc.http://www.prosoco.com
NOTE: Chemical products are sometimes sold under a common
name. These products may not be as pure, but are
the same chemical sold under its chemical name. but are usually adequate
for stain removal work, and less expensive. Common names are indicated below by an asterisk (*).
A. Strong Soap or Scouring Powder
Recommended: First test for effectiveness, water-based proprietary products formulated for removal of petrolium oil from concrete, such as "Aspir-Solv Safe Solvent Cleaner" (Diedrich Technologies, Inc.), or approved equal.
Proprietary cleaners for removal of oil from concrete such as "Consolideck Cleaner-Degreaser" (milder), "Consolideck Oil and Grease Stain Remover" (ProSoCo, Inc.) applied as a poultice using fuller's earth (see below). Rinse thoroughly.
Proprietary engine degreaser such as "GUNK".
B. For Heavy Stains:
Method 1 (See Section 3.02 G.1.)
1. Sodium Hydroxide (NaOH):
a. A white brittle solid that is a strong caustic
base used especially in making soap, rayon,
b. Other chemical or common names include Caustic
soda*; Hydrate of soda*; Hydrated oxide of
sodium*; Lye*; Mineral alkali*; Soda lye*;
Sodic hydrate*; Sodium hydrate*.
c. Potential Hazards: CORROSIVE TO FLESH AND
FLAMMABLE (WHEN IN CONTACT WITH ORGANIC
d. Available from chemical supply house,
drugstore or pharmaceutical supply
distributor, hardware store, or paint store.
2. Sodium Orthophosphate:
a. Other chemical or common names include
Tribasic sodium phosphate; Trisodium
orthophosphate; Trisodium phosphate; TSP*;
Phosphate of soda*.
b. Potential Hazards: CORROSIVE TO FLESH.
c. Available from chemical supply distributor,
supermarket, grocery, or hardware store.
Method 2 (See Section 3.02 G.2.):
1. Mineral spirits:
a. A petroleum distillate that is used especially
as a paint or varnish thinner.
b. Other chemical or common names include
Benzine* (not Benzene); Naphtha*; Petroleum
spirits*; Solvent naphtha*.
c. Potential Hazards: TOXIC AND FLAMMABLE.
d. Safety Precautions:
1) AVOID REPEATED OR PROLONGED SKIN CONTACT.
2) ALWAYS wear rubber gloves when handling
3) If any chemical is splashed onto the
skin, wash immediately with soap and
e. Available from construction specialties
distributor, hardware store, paint store, or
printer's supply distributor.
Method 3 (See Section 3.02 G.3.):
1. Acetone (C3H6O):
a. A volatile fragrant flammable liquid ketone
used chiefly as a solvent and in organic
synthesis and found abnormally in urine.
b. Other chemical or common names include
Dimethyl ketone; Propanone.
c. Potential Hazards: VOLATILE AND FLAMMABLE
d. Available from chemical supply house or
2. Amyl Acetate:
a. Other chemical or common names include Amyl
acetic ester; 1-pentanol acetate; Banana oil*;
b. Potential Hazards: FLAMMABLE.
c. Available from chemical supply house,
drugstore or pharmaceutical supply
distributor, paint store or photographic
supply distributor (not camera shop).
3. Trichloroethylene (highly refined solvent):
CAUTION: TRICHLOROETHYLENE IS HIGHLY TOXIC AND MAY
REACT WITH STRONG ALKALIS SUCH AS FRESH CONCRETE TO
FORM DANGEROUS GASES.
a. Other chemical or common names include Ethinyl
b. Potential Hazards: TOXIC.
c. Available from automotive supply distributor,
chemical supply house (both commercial and
scientific), dry cleaning supply distributor,
paint store, photographic supply distributor
(not camera shop), or printer's supply
C. Filler material such as diatomaceous earth, fuller's
earth, talc, fly ash, cornmeal, cornstarch or cat litter
D. Mineral water
E. Plastic sheeting
F. Clean dry towels for blotting the area after treatment
G. Masking tape
H. Clean, potable water
I. Accessible source of water, soap and towels for washing
and rinsing in case of emergencies associated with the
use of chemicals
J. Small slab of concrete or pane of glass
A. Glass or ceramic container for mixing the solution
B. Wooden utensil for stirring the ingredients
C. Wood or plastic spatula
D. Stiff bristle brush (non-metallic)
1. Provide adequate wash solutions (i.e. water, soap
and towels) before starting the job.
2. Whenever acid is used, the surface should be
thoroughly rinsed with water as soon as its action
has been adequate. Otherwise it will continue
etching the concrete even though the stain is gone.
3.02 ERECTION, INSTALLATION, APPLICATION
NOTE: DO NOT TRY MORE THAN ONE TREATMENT ON A GIVEN AREA
UNLESS THE CHEMICALS USED FROM PRIOR TREATMENT HAVE BEEN
A. Blot excess oil with clean dry cloths.
B. Apply one of the dry powdered materials listed in Section
2.01 to the stained area.
C. Leave it in place for about a day and sweep up or brush
D. Reapply as necessary to absorb as much of the oil as
E. Scrape off any solidified oil or scum using a wooden
F. If there is still oil visible within the concrete, scrub
with one of the following: Scouring powder, strong soap
solution, sodium orthophosphate solution, proprietary
engine degreaser, or one of the proprietary detergents
designed for removing oil from concrete.
G. Thoroughly rinse with clean, clear water and allow to
H. For heavy staining, try one of the following methods:
1. Method 1:
a. Mix 1 pound 6 ounces of sodium orthophosphate
in 1 gallon of water, or 7 ounces sodium
hydroxide in 1 gallon of water.
b. Add enough whiting to the solution to make a
c. Thoroughly wet the concrete with clean, clear
d. Spread the poultice over the stain using a
wood or plastic spatula and allow to dry about
24 hours. Be sure to spread the poultice well
beyond the stained area. The liquid portion
of the paste will migrates into the concrete
where it will dissolve some of the staining
material. Then the liquid will gradually move
back beyond the concrete surface and into the
poultice, where it will evaporate, leaving the
dissolved staining material in the poultice.
e. Brush off the dried paste and scrub the
concrete with clean, clear water.
f. Using a stiff bristle brush, scrub the surface
with scouring powder and clean water to remove
any residual staining.
g. Thoroughly rinse the area with clean, clear
water and allow to dry.
h. Repeat the process as necessary to
sufficiently remove the stain.
2. Method 2 (USE ONLY WITH GOOD VENTILATION):
a. Mix mineral spirits with filler material to
make a thick paste the consistency of oatmeal.
b. Follow procedures 3.02 H.1.c-h. above.
3. Method 3 (USE ONLY WITH GOOD VENTILATION):
a. Mix 1 part acetone and 1 part amyl acetate in
a glass or ceramic bowl.
b. Saturate a white cloth in this solution
(above) or in trichloroethylene.
c. Apply the saturated bandage to the stained
area, extending it well beyond the boundaries
of the stain.
d. Dry-heat a slab of concrete and lay it over
the bandage. The heat is intended to draw the
oil out of the slab, through the bandage and
into the concrete slab.
NOTE: TO AVOID THE DANGER OF APPROACHING THE
FLASH POINT, DO NOT WARM THE SLAB TO A
TEMPERATURE GREATER THAN YOU CAN COMFORTABLY
HOLD IN YOUR HANDS.
Use a heated glass pane instead of a concrete
slab. The glass will NOT absorb the oil, but
drive the oil deeper into the concrete where
it will not show.
e. Add more liquid to the bandage occasionally.
Note: If the oil spreads beyond the edges of
the bandage, the bandage is not big enough.
4. Method For Driveways and Parking Lots: The above
methods should be adequate, but since these
surfaces may be large and offer no problem with
ventilation, the following method may be more
a. Saturate the area (plus about 6 inches more
beyond the stained edges) with mineral
b. Cover the area with one of the absorbent
powdered materials listed above such as
fuller's earth, talc, cornmeal, cornstarch or
c. Leave it in place for about 24 hours.
d. Brush or sweep the absorbent material away and
repeat if necessary.
END OF SECTION