E1501HN Novolac Epoxy (Replaces E1500HN) | Superior Steel & Concrete Chemical Horizontal Protection | Secondary Containment

COVERAGE RATE

• Fish-eyes / surface defects can happen if you stretch the material too thin or fall below the manufacturer’s recommended minimum thickness of 100 sq’/gallon (16 mils DFT).

CURE SCHEDULE

BACK IN-SERVICE TIMES AT75°F. 

APPLICATION TEMPERATURE:  55°-100°F with relative humidity below 90%.

CHEMICAL RESISTANCE, SPLASH & SPILLAGE (spill time for 72 hours contact with surface) Testing at 75°F

MIXING AND APPLICATION INSTRUCTIONS

SURFACE PREPARATION

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, 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 60-80 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.

Use of an improper drill mixer can result in streaking of the color because the pigment has not been thoroughly blended.  It can also create 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.  Many mixing problems described above can be traced back to using a paint mixer..  DO NOT HAND MIX as this approach can also result in the same problems as using a paint mixer.

****IMPORTANT NOTE AFTER MIXING:****

Once parts A&B are thoroughly mixed, immediately pour 100% of all mixed product on the floor in a ribbon pattern, S or W shape over the area you want that amount of product to cover. The risk of leaving product in the bucket is that it will become hard and reduce the working time by a minimum of 50% and may harden and start smoking in the bucket before you get back to it.

APPLICATION PROCEDURE

E1501HN must be applied over the E155CL or PC-1703 while they have a slight tack. E1501 can be applied as an aggregate filled epoxy mortar by hand trowel. Apply pressure to compact material to a dense, monolithic topping. E1500HN can be squeegeed for self-leveling, thin film coating and reinforced floors. E1501N is also used as a 16-40 mil coating. A porcupine roller is recommended to break any air bubbles in the E1500N when rolling.

For exterior use or higher film build, seed dry E1501N with fine aggregate. For vertical coating requirements, recommend the E555VN Novalac Epoxy.

CURE TIME

The aggregate filled epoxy mortar has an open time of approximately 15-20 minutes at 75°F. Immediately after mixing a batch it should be placed and spread onto the surface to be protected. Highly filled, will be ready for foot traffic in 4-5 hours. Self-leveling slurries will be ready for foot traffic in 6-8 hours and fork lift traffic in 24 – 48 hours. In aggressive areas, a 16-40 mil dry sealer coat of E1500HN is recommended to top coat mortars and self leveling slurries. A 16-40 mil coat will be ready for foot traffic in 8-12 hours.

CAUTIONS

E1501HN is not a fire hazard; the flash point is 300°F.  However, under conditions of fire it will burn and release potentially toxic fumes.  The Base portion Part A is relatively inert physiologically.  The Hardener portion Part B is corrosive and contains amines and related materials.  These can cause irritation and possibly chemical burns to the skin and eyes.  This is also true for mixtures of Base and Hardener.  Wear safety glasses, gloves, and protective clothing when using E1501HN Novolac Epoxy.  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.

Check out our customer projects using E1501HN Novolac Epoxy!

Industrial Site Utilizes E1501HN and E55VN to Protect Secondary Containment Area

What is E1501HN Novolac Epoxy?

E1501HN is a 100% solids, two-component novolac epoxy coating designed for extreme chemical environments. It provides superior resistance to acids, alkalis, solvents, and industrial chemicals, making it ideal for secondary containment and industrial flooring.

What makes novolac epoxy different from standard epoxy?

Novolac epoxy is engineered for higher chemical resistance and durability than standard epoxies. It can withstand aggressive chemicals like sulfuric acid and solvents that would break down conventional coatings.

Key difference:

• Standard epoxy → general protection
• Novolac epoxy → extreme chemical resistance & industrial use

What chemicals can E1501HN resist?

E1501HN is designed to handle highly aggressive chemicals, including:

• Sulfuric Acid (up to 98%)
• Hydrochloric Acid (37%)
• Sodium Hydroxide (70%)
• Fuels, oils, solvents, and salts

It is specifically formulated for spill, splash, and secondary containment exposure. For a full list of chemical resistance, check out the “Chemical” Tab on this page. For additional questions if the E1501HN is best for YOUR project reach out to us at 630-675-4509 or [email protected].

Where is E1501HN Novolac Epoxy typically used?

This coating is widely used in:

• Chemical processing plants
• Wastewater treatment facilities
• Battery charging areas
• Refineries and manufacturing plants
• Secondary containment systems
• Concrete floors, trenches, and sumps
• Warehouses
• Manufacturing Plants

Is E1501HN good for secondary containment?

Yes — this is one of its primary applications.
It provides a seamless, chemically resistant barrier that protects concrete and steel from spills and leaks.

Can E1501HN be applied to both concrete and steel?

Yes. E1501HN is designed for:

• Concrete floors and structures
• Steel surfaces and containment areas

For best performance, it is typically used with a primer like E15M epoxy mastic. For primary chemical containment and vertical service protection requirements see E555VN Novolac Epoxy.

How thick should E1501HN be applied?

Typical application thickness:

• 16–40 mils DFT (dry film thickness)
• Coverage: approx. 40–100 sq ft per gallon

This allows it to function as a high-build protective barrier. For additional support on deciding best coverage for your project reach out to us at 630-675-4509 or [email protected].

How long does it take to cure?

At 75°F:

• Working time: 15–20 minutes
• Foot traffic: 4–8 hours
• Full service: 24–48 hours

Note: higher or lower temperatures will affect curing schedule.

Is E1501HN resistant to abrasion and impact?

Yes. In addition to chemical resistance, it offers:

• High abrasion resistance
• Strong impact resistance
• Excellent durability in heavy industrial environments

What temperature can it handle?

• Service temperature up to 250°F (dry)
• Ideal for environments with thermal and chemical stress

Can this epoxy be used in food or regulated environments?

Yes. E1501HN meets USDA requirements, making it suitable for certain regulated facilities.

Does E1501HN require a topcoat?

Not usually.

• Can be used as a standalone coating
• Optional second coat of E1501HN Novolac Epoxy for added protection

What surface preparation is required?

Proper prep is critical:

• Shot blasting or grinding (CSP-2 to CSP-3)
• Clean, dry, and contaminant-free surface
• Concrete must cure at least 28 days

Poor prep is the #1 cause of coating failure. Exterior Performance Coatings offers free application consultation after purchase, to schedule reach out to us at 630-675-4509 or [email protected].

Can E1501HN be applied in cold temperatures?

Yes. It can be applied in:

• Temperatures as low as 45°F
• Cure down to 35°F

Is this epoxy self-leveling?

Yes. E1501HN can be applied as a:

• Self-leveling coating
• Troweled mortar system
• Seeded broadcast system

What industries benefit most from this epoxy?

E1501HN is ideal for:

• Chemical manufacturing
• Oil & gas
• Wastewater treatment
• Food processing
• Power plants
• Industrial maintenance

What are the main benefits of E1501HN Novolac Epoxy?

• Extreme chemical resistance
• Handles acids, caustics, and solvents
• High-build, durable coating
• Excellent adhesion to concrete & steel
• Ideal for secondary containment
• Long-term industrial protection

When should I choose E1501HN over other epoxies?

Choose E1501HN if you need:

• Protection from strong acids or corrosive chemicals
• A secondary containment system
• A coating that outperforms standard epoxy in harsh environments

For a full selection of our Chemical Resistant epoxies check out our Chemical Resistant page.

What are common mistakes to avoid?

• Applying too thin (can cause surface defects)
• Poor surface preparation
• Improper mixing (must follow 2:1 ratio)
• Leaving material in bucket too long after mixing