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

E517M Epoxy Mastic Steel Chemical Containment & Concrete Coating

E517M is a high performance two component, high solids, high build, flake filled, Phenolic Epoxy Mastic.  E517M is based on a cycloaliphatic polyamine cured Epoxy. E517M Epoxy can be used on steel and concrete as a one coat, 20 mil dry film Epoxy on horizontal surfaces and up to 15 mils on vertical surfaces in one coat. The E517M unique coating has excellent chemical, abrasion, impact, and weather resistance with outstanding adhesion to marginally prepared surfaces as well as clean blasted steel surfaces.

The E517M has excellent chemical resistance to a wide range of of acids, caustics and many solvents for spill, splash and short term immersion (up to 72 hours) as a secondary containment coating.

Great for primary containment and tank linings for wide range of chemicals when chemical contact temperatures below 150°F and used with  E15M Epoxy Mastic Primer as part of a specified system (contact us with chemical exposure requirements for system details at  For primary containment and tank lining projects to protect against even more aggressive chemicals, see our E1500VN Novolac Epoxy.

Regular cure Low Temperature application down to 45°F (air and surface low temperature during curing process).  Fast Cure formula available for cold weather applying to surfaces down to 38° (needs to remain at this temp or above for at least 1 hour) and then during curing process temperatures further dropping ok to as low as 25°F.

Easy to apply with brush, roll and airless and conventional spray.

Available in wide range of 6 colors in 1 gallon kits.  5 Gallon kits available special order only, minimum order 40 gallons LTL Freight to commercial location only).  Available in a regular cure and fast set low temp cure to 25°F.

PRIMER: Recommend a concrete primer when applying E517M over concrete.  When using E517M as primary chemical containment, recommend E15M Epoxy Primer

TOPCOAT: Recommend CT-370 for exterior applications for color retention and gloss

Where is the E517M Epoxy Mastic used?

  • Structural steel tanks
  • Tank Linings
  • Concrete Containment
  • Concrete Clarifiers
  • Vessels and Equipment
  • Pipe Racks
  • Storage Tanks
  • Water towers
  • Chemical Processing Plants
  • Pulp and paper mills
  • Sewage and waste water treatment facilities
  • Fertilizer plants
  • Petroleum refineries
  • Electric generating stations
  • Coal handling sites
  • Mines and Marine installations
  • Manufacturing plants
  • Warehouses

Why the E517M Epoxy Mastic?

  • Self Priming on steel
  • Excellent as a primary containment coating for internal tank linings (when part of specified system)
  • Excellent as a secondary containment coating
  • Performs well over epoxy mortars and properly primed concrete surfaces
  • Can be applied on damp surfaces
  • Excellent chemical resistance to acids, caustics, solvents
  • Outstanding impact and abrasion resistance.
  • Exceptional adhesion Exceeds 700 psi
  • Excellent flexibility passes 7/8″ conical mandrel 180º Bend
  • Vertical surfaces up to 15 mils one coat
  • Meets USDA requirements.
  • Cures down to 40°F. (Low temp version down to 25°F)
  • Low V.O.C. 72 GMS/Liter


Solids By Volume 92% +/-2%
VOC 72 g/L
Finish Gloss
Recommended Coverage & Dry Film Thickness 5.0 – 12.0 dry mils at 125-295 sq. ft. per gallon
Coverage per Gallon 125 to 295 sq. ft. per gallon
Packaging 1 gallon 5 gallon (5 gallon ships LTL Freight only)
Mixing ratio 4:1 by volume.  Mix 4 parts Base (Part A) to 1 part Hardener (Part B)
Shelf Life 12 months in unopened container
Flexibility:  Conical Bend Mandrel Method:  ASTM D522, 180º Bend Result:  Passes 7/8”
Humidity Resistance Passes 1,000 hrs ASTM D4585
Application Temp (curing temp down to 40F for regular cure and 25F for Low Temp cure 50 – 120ºF (Regular Cure)
40 – 100°F (Low Temp.Cure)
Abrasion Resistance CS 17 Wheel, 1000 cycles, 1000 g Load Result:  ave 10 mg  ASTM D4060
Pencil Hardness Result 5H ASTM D3363
Sward Hardness Result 44 ASMT D2134
Salt Fog Resistance Passes 1,000 hrs ASTM B117
Adhesion:  Cross Cut Rating of 5 ASTM 3359
Adhesion:  Elcometer 106 Exceeds 700 psi D4541
Dry Heat Resistance 220ºF ASTM D2485
Thinning: Up to 20% S-74 mixed per gallon or substitute 100% MEK
Clean-up SA-74 Thinner or substitute MEK Solvent


Recommended Coverage & Dry Film Thickness 5.0 – 12.0 Dry Mils At 125-295 Sq. Ft. Per Gallon
Coverage Per Gallon 125 To 295 Sq. Ft. Per Gallon


Low Temperature Fast Cure

Temperature Min Recoat Max Recoat
90ºF 3-4 Hours 24 hours
75ºF 5-6 Hours 48 hours
45ºF 24-36 Hours 5 days
35ºF 72-96 hours 14 days

Regular Cure

Temperature Min Recoat Max Recoat
90ºF 4-6 Hours 72 hours
75ºF 7-8 Hours 7 days
45ºF 36-48 Hours 10 days

Times may be longer for thickness above 5 dry mils. For safety and proper product curing, good ventilation is necessary when painting indoors or in confined areas. Be sure the batch numbers are all the same to provide uniform color. Epoxy coatings may yellow or darken during application and after final cure. Low temperature cure hardener colors will be a little darker than the regular cure. This will affect the color but will have no effect on the performance of the product. Heaters that emit carbon dioxide and carbon monoxide can cause the coating to yellow. For maximum exterior gloss and color retention apply a topcoat of CT-370 polyurethane.


Regular cure Low Temperature application down to 45°F (air and surface low temperature during curing process).  Fast Cure formula available for cold weather applying to surfaces down to 38° (needs to remain at this temp or above for at least 1 hour) and then during curing process temperatures further dropping ok to as low as 25°F.

Relative humidity should be below 90%.  When spraying, use a 50% overlapping crosshatch pattern to minimize the occurrence of pinholes.  Do not apply over dew or frost.  The surface should be dry and at least 5°F above the dew point.



(spill time for 72 hours contact with surface)




70% Sulfuric Acid 10% Calcium Hypochlorite Black Liquor
20% Acetic Acid 10% Sodium Hypochlorite Carbon Tetrachloride
20% Nitric Acid 5% Hydrogen Peroxide Jet Fuel
50% Citric Acid Ethyl Acetate Crude Oil
36% Hydrochloric Acid Xylene Distilled Water
50% Sodium Hydroxide Trichlorethylene Fresh & Salt Water
20% Ammonium Hydroxide Lactic Acid Hydrogen Sulfide


Best method is a near white abrasive blast (SSPC-SP10) but E517M will perform well over minimally prepare surfaces depending on service requirements. Because of the lack of “standards” for minimal surface preparation, test applications should be made to determine adequate surface cleanliness and compatibility with existing paint.


Remove oil, grease and other chemical contaminants by solvent wipe or steam cleaning. Abrasive blast
to a “Commercial” (SSPC-SP6) or “Near White” (SSPC-SP10) metal finish.

Galvanized Steel/Aluminum

Solvent clean per SSPC-SP1 or steam clean.  Sweep blast to achieve a minimum 1 mil profile.  Apply one (1) coat of E15M as a primer at 3-4 mils DFT.

Previously Painted Surfaces

Solvent clean per SSPC-SP1 and/or power wash.  Remove loose existing paint by wire brush or other hand tools.  Feather edges.  Make test application to check for compatibility.


In all cases of surface preparation, the pH should be checked.  A pH reading of 7.0 to 8.5 is acceptable. Also, a Water Dissipation Test should be made on random areas of the floor to determine if the proper degree of porosity has been achieved.  Before the installation of any Gulf Coat Paint Products, the substrate should be examined for moisture.  Test for moisture vapor transmission using ASTM F-1869 Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor using Anhydrous Calcium Chloride.  The maximum allowable rate is 3 lbs. per 1,000 square feet per 24 hours.  Test for relative humidity in concrete floor slabs using Probes according to ASTM F-2170.  This test measures the presence relative humidity of the slab below the surface.  The maximum relative humidity should be below 80%.

New concrete must be cured at least a minimum of 28 days before applying a coating.  On-grade slabs must have moisture vapor barrier in place.  All laitance, sealers, efflorescence, chemical contaminants, grease, oil and other foreign material must be removed.  The prepared surface must be clean, dry and structurally sound.  Recommend mechanical preparation by means of shot blasting or diamond grinding to achieve a CSP-2 or CSP-3 profile, in accordance with the International Concrete Repair Institute (ICRI).  The profile should reflect something similar to a 60-100 grit sandpaper.  If the substrate is not properly prepared and the appropriate profile is not achieved, failure of the product to adhere to the substrate may occur.

Old concrete surfaces must be structurally sound.  Any unsound areas must be repaired prior to proceeding with the resinous installation.  For proper patching and repairing, use CF-615 and/or E1000 with graded aggregate.  Remove existing paint and loose concrete by rough sanding, sandblasting, high pressure water cleaning, shot blasting or grinding.  In some cases where plant conditions allow, a stripper may be used to remove excessive build-up of paints or sealers.

Epoxy Mortars

Surface to be coated should be free of all contamination Observe the manufacturer’s recoat time recommendations.

Stir each component to a uniform consistency, using a slow speed variable speed explosion proof drill with a Jiffy Mixer.   Do not mix by hand.  Then mix four (4) parts Base A with one (1) part Hardener B for three (3) minutes using the powered Jiffy mixer.  Make sure any pigment settled to the bottom is incorporated.  Do not vary proportions.   When applying E517M in cool or cold conditions, store material at 65-75°F 1-2 days prior to application. E517M may be reduced up to 20% S-74 (or 100% MEK) per mixed gallon. Do not substitute reducers.

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.

Use of an improper drill mixer can result in curing problems if the hardener also called activator (Part B) is not thoroughly blended with the resin (Part A) which can cause some areas on your floor to remain soft and not harden properly.  DO NOT USE A PAINT MIXER.  Most mixing problems described above can be traced back to using a paint mixer..  DO NOT HAND MIX as this approach can result in the same problems as using a paint mixer.



Airless Spray Graco Conventional Spray DeVilbiss
Gun Silver Plus Gun MBC 510 or JGA
Pump 33:1 Extreme Fluid Tip D
Tip Range .019 to .023 Air Cap 64 or 704
Hose 3/8 inch ID Atomizing pressure 40 psi
Pressure 2500 to 300 psi Pot Pressure 50 psi
Hose 1/2″ ID

Roller – Use a 3/8” – ½” nap, phenolic core, shed resistant roller cover.  Roll in the same direction always keeping a wet edge.  Do not over roll product.

Brush – Use pure bristle brush.

When spraying, use a 50% overlapping crosshatch pattern to minimize the occurrence of pinholes.  Do not apply to surfaces below 40°F or above 120°F.  Do not apply over dew or frost.  The surface should be dry and at least 5°F above the dew point.


  • Do not apply over frost, wet or damp surfaces or extremely high humidity conditions.
  • Do not apply over expansion joints.
  • Do not apply if the surface temperature is within 5° of the dew point.
  • Partially used containers must be reclosed tightly to prevent moisture in air from reacting with material and forming a tough skin.  Skin can be removed and remaining material used.  Be sure to stir.


E517M Base is flammable and E517M Hardener is corrosive.  Keep away from all sources of ignition during mixing, application and cure.  The Hardener and Base can cause eye and skin burns as well as allergic reactions.  Use goggles, fresh air masks or NIOSH approved respirators, protective skin cream and protective clothing.  This product is sold without warranty as to performance expressed or implied.  Users are urged to make their own tests to determine the suitability for their particular conditions.

SEE MATERIAL SAFETY DATA SHEET FOR FULL SAFETY PRECAUTIONS.  FOR PROFESSIONAL AND INDUSTRIAL USE ONLY  KEEP AWAY FROM CHILDREN.  NOT FOR RESIDENTIAL USE 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 contain chemicals that may CAUSE SERIOUS PHYSICAL INJURY. BEFORE USING, READ THE SAFETY DATA SHEET AND FOLLOW THE PRECAUTIONS TO PREVENT BODILY HARM.