E101C Moisture Cured Urethane Clear Heavy Traffic Floor Sealer | Dustproofer | Prevents Spalling

COVERAGE RATE

CURE SCHEDULE

NOTE:  Always recoat E101C the same day before rain, fog and/or condensation can occur on the coating.  These conditions will result in poor adhesion of the next coat.  When applying multiple coats of MCU-101, lightly sand with 125 grit sander between coats.  Be sure to remove all dust.  Higher humidity will decrease the recoat times.

APPLICATION TEMPERATURE: 50ºF – 90ºF Do not apply to surfaces below 50°F or above 90°F. Do not apply over dew or frost. The surface temperature should be at least 5°F above the dew point.

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 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.

Proper floor preparation should include acid etching to create a textured surface followed by power washing.  For an acid etch preparation we suggest our E760CE Muriatic Replacement as a safer alternative.

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.

MIXING INSTRUCTIONS

E101C is made ready for use by stirring.  When used over a period of time, stir occasionally to maintain uniform mix.  Thinning is not usually necessary.  If done, use up to 1 pint SA-50 Reducer which is a water free grade (100% Xylene).  Keep unused material tightly closed at all times.

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.

NOTE:  Always wear protective gloves and clothing while mixing and applying E101C.  Do not get on skin.

APPLICATION PROCEDURE

E101C may be applied by Lambswool application, brush or spray.  When rolling, the roller cover should be a 3/8″ nap lint free professional grade epoxy roller with a phenolic core, and brushes should be natural bristles.  For spray, it is important that a moisture/oil trap be used on incoming air, and that fluid lines be flushed first with an anhydrous solvent (water free) such as S-74 (100% MEK).  Also, flush every 1-2 hours during use to keep lines clean from material build up.  When applying multiple coats of E101C, lightly sand between coats.  Be sure to remove all dust.

Refer to the cure schedule as a guideline to follow, in addition we strongly recommend to test the coating before recoating or topcoating. This is done by pressing your thumb on the coating in multiple places to ensure a fingerprint impression is not visible. If there is no impression visible, then coating the floor can be done. Note, colder or hotter than 75 degrees can affect the curing time schedule  

Required equipment is as follows:

Airless Spray

Use a minimum 20:1 ratio pump with 80-100 psi inbound air.  Recommended a .011”-.017” tip.  Adjust pressure for proper atomization based on selected tip.

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

CAUTION DANGER

E101C is flammable.  Keep away from all sources of ignition during storage, mixing, application and cure.  Contains Polyisocyanate based on MDI and aromatic solvents. When applying, the use of goggles, fresh air masks or NIOSH approved respirators, protective skin cream, and protective clothing is recommended as a standard practice. 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.

LIMITATIONS:

• Do not apply over frost, wet or damp surfaces or extremely high humidity conditions.
• Not recommended as tank lining for constant immersion.
• Must be recoated within 6 hours at 75°F and 50% R.H.
• 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 restir.

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 the E101C Moisture Cured Urethane!

E101C Moisture Cured Urethane Protects Storage Garage

What is E101C moisture cured urethane used for?

E101C is a clear industrial floor sealer, dustproofer, and primer designed for concrete, wood, and masonry surfaces. It’s commonly used in:

• Warehouses
• Garage floors
• Factories and production areas
• Commercial wood floors
• Industrial facilities

It creates a durable, abrasion-resistant protective layer that holds up in heavy traffic environments.

Is E101C a good option for high-traffic floors?

Yes—E101C is specifically designed for heavy-duty use. It offers:

• Excellent abrasion and impact resistance
• Strong adhesion to concrete and wood
• Long-lasting wear in forklift and vehicle traffic areas

It’s widely used in warehouses, plants, and garages where cheaper sealers fail quickly.

Does E101C help stop concrete dusting and spalling?

Yes. E101C acts as a dustproofer and surface hardener, helping:

• Eliminate concrete dust caused by surface wear
• Reduce spalling from freeze/thaw cycles
• Protect weak or aging concrete surfaces

This is one of the biggest reasons contractors choose it for older slabs.

How fast does E101C cure?

E101C is a fast-curing coating, with:

• Recoat time: as little as 1–2 hours
• Tack-free time: about 30–60 minutes depending on conditions

This makes it a great option when downtime needs to be minimized. Note temperature can affect cure schedule. For free application consultation, reach out to us at 630-675-4509 or [email protected].

Is E101C easy to apply?

Yes—E101C is a single-component urethane, meaning:

• No mixing required
• Can be applied by roller, brush, or spray
• Faster and simpler than multi-part epoxy systems

This reduces labor costs and installation errors.

Can E101C be used as a primer under epoxy or other coatings?

Absolutely. E101C works well as a penetrating primer/sealer under:

• Epoxy floor coatings
• Urethane topcoats
• Polyaspartic systems

It helps improve adhesion and reduce outgassing issues. Can apply multiple coats of the E101C for longer lasting durability. When applying 2 coats, recommended sanding between coats with 120 grit sander.

Is E101C UV stable?

No—E101C is not UV stable and will amber over time.

For decorative or sun-exposed areas, it’s best used:

• Under a UV-stable topcoat
• Or in indoor / non-visible applications

For a list of our UV stable topcoats check out or Polyaspartic and Polyurethane page.

What surfaces can E101C be applied to?

E101C bonds well to:

• Concrete floors
• Wood surfaces
• Masonry

It’s especially effective on porous or worn substrates needing reinforcement.

What coverage can I expect from E101C?

Typical coverage is:

• 290–440 sq ft per gallon per coat depending on surface porosity

Two coats are usually recommended for best durability. For help determining quantity amount for YOUR project reach out to us at 630-675-4509 or [email protected].

What are the limitations of E101C?

• Requires humidity (50%+) to cure properly
• Must be applied within a tight recoat window (2–6 hours)
• Not recommended for constant immersion environments
• Will amber if exposed to UV

Is E101C a cost-effective floor coating?

Yes—E101C is considered a high-value industrial sealer because:

• Lower material cost than many epoxy systems
• Faster install = lower labor cost
• Strong performance in demanding environments

It’s a go-to option when you need performance without the price of full coating systems.

When should I choose E101C over epoxy?

Choose E101C when you need:

• A budget-friendly protective sealer
• Fast turnaround / minimal downtime
• A breathable system that handles slight moisture better
• A primer under another system

Choose epoxy when you need:

• Thick build systems
• Decorative finishes
• Maximum chemical resistance in immersion environments

For a full list of our epoxy options check out our Epoxy page. For further consultation on which product is best for YOUR project reach out to us at 630-675-4509 or [email protected].