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  • Overview
  • Specs
  • Coverage Rate
  • Cure
  • Chemical
  • Application

Oil Stop Epoxy Primer/Coating

Oil Stop Epoxy Primer/Coating is a two component 63% solids, solvent based epoxy coating that exhibits excellent characteristics for coating over petroleum based oil contaminated concrete.  This product allows excellent substrate penetration which results in excellent adhesion and is an ideal primer or stand alone black colored coating for an oil contaminated concrete substrate.

Recommended for petroleum oil contaminated substrates.  However, this product is not intended for use over vegetable oil, animal fat or synthetic oil contaminated concrete.  This product can withstand exposure to many common solvents and chemicals.

PRIMER: None required

TOPCOAT: Optional-  Many other products are suitable as topcoats.  Many products are suitable as topcoats including epoxy and urethane coating systems.

 Where is Oil Stop Epoxy Primer/Coating used?

  • Concrete

Why Oil Stop Epoxy Primer/Coating?

  • Great for coating over oil contaminated concrete
  • Can use as a primer before applying decorative coating systems
  • Good as stand alone black colored coating with a satin sheen
  • Excellent substrate penetration through oil contaminated surfaces
  • Excellent adhesion where standard epoxies typically fail
  • Long 1 – 2 hour pot life
  • High solids, 2 component


Solids By Weight 71%   By Volume 63%
VOC  330 g/L
Colors  Black only
Recommended Film Thickness  5-8 mils wet, 3-5 mils dry per coat
Coverage per Gallon  200 – 320 sq’/gal @5-8 mils wet thickness
Packaging 2 gallon kit, 10 gallon kit
Mix Ratio 1:1 by volume
Shelf Life 1 year in unopened container
Finish  Satin gloss (40-60 at 60 degrees @glossmeter)
Abrasion Resistance Tabor abrasor CS-17 wwheel with 1000 gram total load and 500 cycles = 37  mg loss
Flexibility  No cracks on a 1/8″ mandre
Adhesion 425 psi @ecometer (concrete failure, no delamination)
Viscosity  Mixed = 150 – 300 cps (typical)


Coverage Per Gallon  200 – 320 Sq’/Gal @5-8 Mils Wet Thickness


Pot Life – 2 gallon volume 1 – 2 hours
Tack Life (dry to touch) 2 – 4 hours
Recoat or Topcoat 4 – 8 hours
Light foot traffic 16 – 24 hours
Full cure (heavy traffic) 2 – 7   days

APPLICATION TEMPERATURE: 55-90 degrees F with relative humidity below 75%


 acetic acid 5% A
 xylene B
 mek A
 gasoline B
 10% sodium hydroxide E
 50% sodium hydroxide D
 10% sulfuric C
 10% hydrochrolic acid C
 20% nitric acid A
ethylene gylycol C
Toluene B
1,1,1 trichloroethane A

Rating key: A – not recommended, B – 2 hour term splash spill, C – 8 hour term splash spill, D – 72 hour immersion, E – long term immersion.


1) PRODUCT STORAGE: Store product at normal room temperature. Continuous storage should be between 60 and 90 degree F.

2) SURFACE PREPARATION: Surface preparation will vary according to the type of complete system to be applied.  Make certain that the substrate where the E5820BL is to be applied is clean, sound and free of all laitance, dirt, dust, oil, grease, or foreign contaminants.  Make certain that the floor is completely dry before application.  It is often undesirable to shot blast a petroleum contaminated concrete surface unless the applicator is prepared to steam and solvent clean the area.  Shot blasting tends to open oil filled pores that will be detrimental to the application process.  The method of cleaning an oil soaked floor is best determined at the job location.  However, solvent cleaning, steam cleaning, and water emulsion cleaners can all be considered.  A test should be made to determine that the concrete is dry; this can be done by placing a 4’X4’ plastic sheet on the substrate and taping down the edges.  If after 24 hours, the substrate is still dry below the plastic sheet, then the substrate is dry enough to start coating.  The plastic sheet testing is also a good method to determine if any hydrostatic pressure problems exist that may later cause disbonding.

3) PRODUCT MIXING: This product has a one to one mix ratio by volume- merely mix equal volumes such as 1 gallon of part A to 1 gallon of part B.  After the two parts are combined, mix well with slow speed mixing equipment such as a jiffy mixer until streak free. Improper mixing may result in product failure. For best mixing results and proper blending of parts A and B, recommend a Jiffy Mixer style drill mixer.

4) PRODUCT APPLICATION: We recommend one coat of E5820 followed by one coat of E5143/E5144 and then two additional coats of E5320/E5321 in the same color as the E5143/E5144.  Due to the vastly varying contamination parameters, it is recommended that the applicator both check the adhesion of this product to the substrate as well as a thorough evaluation of the proposed intermediate and topcoat selections.  Petroleum based oils have a tendency to migrate upward through newly placed coatings and could cause disbonding if all preceding coats are not inspected prior to topcoating.  Clean all previous coatings as necessary.  THIS COATING SHOULD NOT BE USED UNTIL A REPRESENTATIVE SAMPLE PATCH HAS BEEN PLACED AND THOROUGHLY EVALUATED FOR SUITABILITY.  Make certain that the floor temperature and air temperature is between 55 and 90 degrees Fahrenheit.  Preferably, the relative humidity should be below 90%.  This product should be applied by roller or brush at five to eight mil thickness when wet.  Too thick of an application may result in product failure.

5) RECOAT OR TOPCOATING:  After applying the NP820 and the coating has cured sufficiently, the applicator can then proceed with the NP143/144, NP321, application.  Allow sufficient time between all subsequent coatings; and remember, as temperatures become lower all products will require additional time to cure.  Read the individual technical data sheets for each product before proceeding.  If different topcoats are desired, contact your representative for application details before proceeding.

6) CLEANUP: Use xylol.

7) FLOOR CLEANING: Caution!  Some cleaners may affect the color of the floor installed. Test each cleaner in a small area, utilizing your cleaning technique.  If no ill effects are noted, you can continue to clean with the product and process tested.

8) RESTRICTIONS: Restrict the use of the floor to light traffic and non-harsh chemicals until the coating is fully cured (see technical data under full cure).  It is best to let the floor remain dry for the full cure cycle. Dependent on actual complete system application, surface may be slippery, especially when wet or contaminated; keep surface clean and dry.


  • Color or gloss may be affected by humidity, low temperatures, chemical exposure or sodium vapor lighting.
  • Product will yellow in the presence of UV light
  • For best results use a 1/4” or 3/8” nap roller.
  • Slab on grade requires moisture barrier
  • Substrate temperature must be 5°F above dew point.
  • All new concrete must be cured for at least 30 days
  • Improper mixing or too thick of an application may result in product failure
  • Physical properties listed on this technical data sheet are typical values and not specifications.
  • See tab for application instructions.
  • See Application tab for limitations of our liability and warranty

NOTICE TO BUYER: DISCLAIMER OF WARRANTIES AND LIMITATIONS ON OUR LIABILITY We warrant that our products are manufactured to strict quality assurance specifications and that the information supplied by us is accurate to the best of our knowledge. Such information supplied about our products is not a representation or a warranty. It is supplied on the condition that you shall make your own tests to determine the suitability of our product for your particular purpose. Any use or application other than recommended herein is the sole responsibility of the user. Listed physical properties are typical and should not be construed as specifications. NO WARRANTY IS MADE, EXPRESSED OR IMPLIED, REGARDING SUCH OTHER INFORMATION, THE DATA ON WHICH IT IS BASED, OR THE RESULTS YOU WILL OBTAIN FROM ITS USE. N0 WARRANTY IS MADE, EXPRESSED OR IMPLIED, THAT OUR PRODUCT SHALL BE MERCHANTABLE OR THAT OUR PRODUCT SHALL BE FIT FOR ANY PARTICULAR PURPOSE. NO WARRANTY IS MADE THAT THE USE OF SUCH INFORMATION OR OUR PRODUCT WILL NOT INFRINGE UPON ANY PATENT. We shall have no liability for incidental or consequential damages, direct or indirect. Our liability is limited to the net selling price of our product or the replacement of our product, at our option. Acceptance of delivery of our product means that you have accepted the terms of this warranty whether or not purchase orders or other documents state terms that vary from this warranty. No representative is authorized to make any representation or warranty or assume any other liability on our behalf with any sale of our products. Our products