CoverShield U140 Semi Gloss Heavy Duty Oil and Stain Resistant Semi Gloss Coating


Heavy Duty Oil and Stain Resistant Concrete Sealer.

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CoverShield U140 Semi Gloss Heavy Duty Stain & Oil Resistant Concrete Sealer


How Can You Stop Oil From Staining Your Concrete?

Concrete itself is a naturally porous material. It’s open. It has capillaries that solutions and contaminants can soak into.

You need to block those pores by applying a barrier, or some kind of repelling chemical to stop that oil from getting into the concrete.

There are 2 ways to do it:

1) It can be done with a film-forming sealer.

Something that will put a barrier across the surface, and stops the oil from getting into the concrete.

2) It can also be done with a penetrating sealer.

This product is resistant to oil, not just a water repellent sealer. Some examples would be our CoverSeal PEN 55 and Coverseal Premium. These products will soak into the concrete, and repel the oil from getting down into the surface.

Covertec Products’ popular film-forming sealer is called CoverShield U140.

It provides an absolute barrier, to stop oil getting into the concrete. It soaks into the subsurface of the concrete, and leaves a thin film on the top that is:

  • Very oil resistant
  • Highly fuel resistant
  • Provides an absolute barrier.

With penetrating sealers, the surface is still open, so technically, oil can get into that top surface. However, the CoverShield U140 provides a highly resistant barrier which would be the best way to stop oil getting into concrete.


What Is CoverShield U140 Semi Gloss Concrete Sealer?

CoverShield U140 is a highly oil and stain resistant polyurethane sealer.

It’s water-based, and provides thin coat that goes on concrete to easily repel:

  • Oil
  • Acid
  • Chemical stains.

We recommend using it mainly for interior applications such as:

  • Trowel finished concrete
  • Smooth concrete

Typical areas include auto garage floors, workshops or in factories.

The product has a lot of industrial applications, but it’s suitable for consumer type situations as well. Customers report using it successfully on residential garage floors, driveways, etc.

It can repel virtually any petroleum-based chemical or oil solutions that might get into a concrete surface. It’s ability to repel oil, diesel and hydraulic fluid spills is unparalleled.

It’s also used on decorative concrete. It’s a sealer for protecting colors on stained concrete. Simply apply it after staining your surface and it will provide a highly oil resistant seal on the surface.

CoverShield U140 also has strong industrial uses due to it’s ability to resist and repel:

  • Diesel
  • Hydraulic motor oils
  • Cutting oils.

In factories where cutting fluids and lubricating oils are used, it’s a challenge to prevent those chemicals from penetrating the slab. CoverShield U140 has no problem repelling these from entering a concrete surface.

One of the benefits customers rave about with U140 is that the surface prep is insanely easy. As long as the floor is clean and it’s absorbent (water will soak into it), you can apply CoverShield U140.

It’s the exact opposite of applying an epoxy coating that requires surface grinding or expensive prep.

While epoxy coatings provide oil and chemical resistance, you have to significantly grind the concrete down so it sticks to the floor. You also have to apply a very thick layer of the epoxy to get the maximum protection.

CoverShield U140 provides extreme protection… but with a very thin coat. On top of that, because it’s very thin, it doesn’t lift and peel like an epoxy would.

CoverTec’s U140 clearly offers contractors and DIY-ers more bang for the buck because it:

  • Requires very little surface surface prep
  • Provides higher a coverage area
  • Is extremely easy to application.

Is CoverShield U140 A Commercial Concrete Sealer?

CoverShield U140 was developed initially for commercial and industrial applications. CoverTec Products has a long track record of success with this product in those environments because of its heavy duty oil and stain resistance.

A key factor of the U140’s success is that it doesn’t need extensive surface prep. You don’t have to grind the floor aggressively. As long as the concrete will accept a water (and the U140 can soak in), that is sufficient prep to use the product.

This ease of use allows us to make it available to consumer and DIY types of applications like:

  • Home garage floors
  • Personal workshops
  • Homeowner hobby shops
  • Etc.

These are great areas for homeowners to use CoverShield U140 on the interior.

On the exterior of the home, you can use it on:

  • A driveway
  • Stamped concrete
  • Stained concrete
  • An overlay
  • Etc.

This product used in these areas provide maximum resistance with a minimal prep.


What Are Typical Situations To Use CoverShield U140?

Let’s look at some typical applications for CoverShield U140.

On the new construction side, it’s often applied to fresh concrete in:

  • A factory
  • A workshop
  • A garage floor
  • An auto shop.

In these cases, there’s a brand new floor and the surface will be exposed to all types of chemicals repeatedly. The last thing you want to do is stain that floor with oil hydraulic fluid.

If the objective is to protect that concrete from oil stains and chemical contamination, the U140 performs above and beyond.

It will soak into the concrete, put an absolute barrier on the floor, and keep chemicals from penetrating the concrete. And it doesn’t lift and peel like an epoxy would.

The thin coating the U140 provides is a very cost effective, but highly stain resistant solution.

Another typical situation where CoverShield U140 is used is on existing floors with oil contamination.

Slip and fall issues are always a problem in these environments. Maybe there’s a need to comply with local or federal laws from the EPA, OSHA or other regulatory bodies.

To protect that floor, you’ve got to clean it first, and then seal it to prevent further contamination.

Again, CoverShield U140 provides a thin and tough long-term protective barrier across the surface in these situations to prevent staining and minimize any safety issues.

The seal is so tough that it can hold up to forklift traffic, as well as the contaminants that may spill onto the floor.


EPA Rules Factory and Safety OSHA Customers Or Workers

Another area of application for CoverShield U140 is on floors where it’s critical to keep them clean and safe for workers, customers or the public.

Situations like:

  • OSHA & EPA regulations
  • Potential contamination areas
  • Clean rooms
  • Safety areas.

In these environments, keeping the contaminants from soaking into the workshop or factory floor concrete is no problem for the U140.

It will keep those substances on the surface, and allow you to see them and clean them easily.


Best Applications For U140 Concrete Sealer

The most suitable applications for CoverShield U140 are:

  • Concrete floors
  • Smooth concrete
  • Trowel finished concrete
  • Machine finished concrete
  • Polished concrete.

For example, floors you’ll find inside a workshop, a factory, a garage and auto-body shop. In cases where the floor area is large square footage, laying down solutions like epoxy coatings can be very expensive. Aside from the hefty costs of an epoxy product, they also tend to lift and peel easily.

CoverShield U140 outperforms epoxy solutions in every way. It is much cheaper, does not lift and peel, and it lasts several years. Not to mention that it has higher coverage, typically 800 square feet per gallon.

The minimal surface prep is also another reason why customers love the U140. So long as the floor is clean and absorbent, you can apply the product to the surface.

With two coats you get a very oil and stain resistant coating that easily holds up against:

  • Diesel
  • Cutting oil
  • Motor oil
  • Gasoline
  • Hydraulic fluids
  • Jet fuel
  • Etc.

The U140 provides great stain resistance in environments where these contaminants threaten the safety and cleanliness for workers and the public.

With regard to exterior use situations, CoverShield U140 performs very well in places like:

  • Parking decks
  • Loading docks
  • Driveways
  • Access ways
  • Ramps.

The U140 is also UV-resistant, making outside aplications an easy decision. So long as the concrete is smooth or dense, and passes the water test, it’s a perfect fit for your situation. You can also use it on decorative and stamped concrete surfaces.

Important Note:

If you’re deailing with a rough or broom finish concrete surface, a penetrating sealer like CoverTec’s PEN 55 may be more appropriate. It’s also very oil and stain resistant, but works better in those highly textured environments.


What Makes CoverShield U140 Produce Better Results?

The main advantages of CoverShield U140 over competing products inlcude:

– Ease of application & minimal surface prep.

The surface you’re working on doesn’t require extensive surface prep to use the U140… unlike other 3rd party sealers.
You can apply it over a smooth surface, WITHOUT any grinding, as long as that surfaces is absorbent and passes the water test.
If the surface is scratched in a local area after applying U140, you repair the area quickly and re-apply another coat.

– High chemical and oil resistance.

CoverShield U140 is a 2-part Urethane. It chemically reacts and provides a dense interlocked seal across the floor. It’s much more chemical resistant than a standard epoxy, Urethane or acrylic sealer. After soaking into the surface, it leaves a very thin film that’s highly oil and chemical resistant.

– It doesn’t lift and peel after application.

When you’re sealing a concrete slab, you must avoid lifting and peeling on the surface. The U140’s tough, thin seal doesn’t lift and peel like an epoxy or a standard coating typically will. Basically, it’s so close to the surface that it just doesn’t scrape off.


Things You Should Watch Out For With Big Brand Products

The problem with epoxy products is that in order to have a long lasting coat, you need to do extensive surface prep. You need to apply it fairly thick – 30 mils or above – in order to get a good seal or durable coating.

If you don’t do that, it will chip, lift and peel… and you’ll have extensive problems. As such, it doesn’t have what I would call “sheet failure.”

Ultimately, you’ll end up HAVING to re-coat the surface in a short period of time.

CoverShield U140 only requires the surface to be clean and porous. If water will soak into it, then so will the U140. The surface coverage using the U140 is a lot higher than the typical epoxy or big brand sealer.

Let’s talk about coverage. If you’ve got a coating that’s only doing 200 – 300 square feet per gallon, your costs will be high.
Whereas the U140 – as a thin coat application – typically covers around 800 square feet per gallon. Clearly, there’s a tremendous difference in the coverage over the surface.

Another to understand is you’ll need to do repairs from time to time. Every surface is subject to scratches and scrapes. In order to repair the damages to a floor sealed with the U140, it’s a matter of scrubbing the surface and re-applying it. This product bonds very well to itself.

With competing products, you’ll need extensive grinding, sanding or stripping of the surface just to re-apply that product. All of this hassle – and unnecessary work – can be avoided if you’re using something like CoverShield U140. It’s a very, what we call sustainable coating. It bonds very well to itself. It is easy to re-coat.

Applying CoverShield U140 – Recommended Steps

When applying the U140, follow these simple guidelines.

The concrete needs to be clean. It needs to be absorbent in order to apply the product.

If you’ve got new concrete, it may require some densifying. You can use a densifier like CoverTec’s CD80. It’s a good densifier to use prior to sealing the surface. That’ll give you an even harder surface to bond with, and increase the results of the sealing process. Once the floor has been cleaned and hardened, then you can apply the U140.

It’s best applied with a microfiber flat-mop. And you’ll typically get around 800 square feet of coverage per gallon. (Very good coverage.)

At CoverTec, our customers use the term “thin to win.” It’s all about thin coats. Two thin coats is the minimum requirement for any application.

You can also spray down the product, and then spread it thin. You can choose to pour it out on the surface, and then spread it around with a flat mop. If you’re doing large areas, I would recommend using a 3/8th Nap roller – preferrably 18 inches wide. This way, you get more efficient production.

Each coat takes about 3 hours to dry. It depends on the temperature of the slab, but if you’re in the mid 70 degree range, it’s typically about 3 hours.

The product’s ready to use, so you don’t have to dilute it. You just mix the 2 parts together and spread it out on the surface. Wait 3 hours for the first coat to dry properly, then apply the second coat.

If you need more time between coats, no problem. You can apply the second coat the next day… actually up to 48 hours after the first application. The U140 has what we call “a long re-coat window.” As long as the surface is clean, you can come back and re-apply it. It bonds very well to itself.


Here is something to watch out for:

If the temperature is low… everything takes longer. Once you’re below 70 degrees (Fahrenheit), the dry time can double. In extreme cases, you could need 6 to 12 hours before the first coat dries.

Important Note:

Make sure the first coat is completely dry before you apply the second coat.


Why Does CoverShield U140 Have A Shelf Life?

CoverShield U140 has a 12-month shelf life. That’s because it’s a 2-part product. There’s an “A” side, and “B” side called the Catalyst. The Catalyst is sensitive to moisture.

If moisture gets into the Catalyst’s container, it will cause a reaction. It will generate little bubbles and a lower the viscosity (increase the thickness) of the material. This thickness (as a result of out-gassing) will affect the final appearance and function of the U140’s film across the surface.

After about 12 months – if the U140 is not stored correctly – you might see this happen. Hence the reason for CoverTec’s shelf-life for the product.

In the case of using product beyond the 12-month shelf life and having been exposed to moisture, you might notice:

  • Seeing “pin holes” through the bubbles coming out.
  • You don’t get the same coverage as you normally would.
  • The applied product won’t have the same physical characteristics that you would that we expect (per our data sheets).


Does CoverShield U140 Interact Poorly?

CoverShield U140 is designed to go on a porous surface, either inside or outside the property.

If there’s an existing coating on the surface, like an epoxy or a urethane, that is not a good application for the U140.

The only product that would be beneficial to apply to the surface prior to sealing with the U140 is a densifier.

CoverTec’s CD80 – which is a highly reactive – will soak into the concrete and harden the surface.

It acts as a moisture blocker, and provides a good surface on which you can use the U140.

As a rule, CoverTec does not recommend using CoverShield U140 as a top coat to an existing sealer coat.

For more information on using this product, please contact us.




  • Scratch resistant
  • Oil and stain resistant
  • Odorless
  • UV stable
  • Easy to apply
  • Chemical resistant
  • Waterproof
  • Excellent abrasion resistant

Shelf Life

12 months when stored at 77°F (25°C) or less in a dry and shaded area. Protect from freezing.


Typical Uses

  • Industrial floors,
  • Parking decks
  • Workshops
  • Walkways, stairways
  • Counter tops
  • Driveways


Theoretical Coverage

Approximately 800ft2 /gallon (19.6 m2 /liter) per coat depending on the density and porosity of the substrate.

Additional information


1 Gallon, 1 Quart, 4 Gallon


Clear Coating, Concrete Protection, Oil and Stain Resistance


Interior, Exterior




800 sq.ft/gal (19.5 sq.m/l)


Low-pressure spray, microfiber flat mop, roller

Dry time

Light foot traffic 4 hrs Vehicular traffic 48 hrs

Exposure Conditions

Moderate to severe oil, chemical and wear resistance


Clear, medium gloss


Water base, zero odor

Do your research before you waste your money!

You’re not going protect your concrete against brake fluid by using some kind of polish guard.

CoverShield U140 concrete sealer produces a low maintenance easy to clean floor that will stand up to forklift and vehicular traffic.

U140 concrete sealer incorporates the newest polyurethane
nano technology and exhibits incredible oil and stain resistance properties.

Oil Stain Protection

CoverShield U140 is hard wearing polyurethane sealer that provides heavy duty oil stain protection and is designed for use in warehouse and workshop type environments.

Protect your investment

U140 oil resistant concrete sealer will not only provide heavy duty chemical and stain resistance, but it will also prevent dusting, spalling and inhibit efflorescence.

Clean-up time and removal of spills is reduced and simplified since dirt, grease, oil and chemicals that normally soak into the concrete are easily removed from the surface.


Acid Wash Concrete Driveway Sunrise

U140 is resistant to the following contaminants

You’re not going to resist cutting oil with a water repellant.

  • Dirty Motor Oil
  • Diesel Fuel
  • Brake Fluid
  • Anti-Freeze
  • Transmission Fluid
  • Gasoline
  • Skydrol
  • Vegetable Oil
  • Hydrochloric Acid
  • Sodium Hydroxide
  • Bleach
  • Sulphuric Acid
  • Acetic Acid
  • White Vinger
  • Lemon Juice
  • Mineral Oil
  • Animal Fats
Cleaning Stained Concrete Sunrise

You're best route to get the oil out

Floor hardeners are not motor oil resistant. Your shop floor is going to stain!

CoverShield U140 for a heavy duty durable gloss finish surface sealer for concrete. This product is a water clear high build, low odor, low VOC, water bourne polyurethane coating. U140 incorporates innovative raw materials that impart outstanding adhesion and abrasion resistance. The physical properties of U140 are comparable with or even better than solvent borne counterparts in terms of chemical resistance, mechanical and UV stability. The product offers excellent resistance to “hot tire” pickup and stains from oil and hydraulic fluid. CoverShield U140 is water clear and available in gloss and matte versions. U140 meets and exceeds ADA requirements for a non slip surface. U140 also qualifies for LEED EQ4.2 points as a low emitting product.


Concrete Cleaning Service Sunrise


  • Oil and Stain Resistant
  • Scratch resistant
  • Odorless
  • UV Stable
  • Easy to Apply
  • Chemical Resistant
  • Waterproof
  • No Hot Tire Pickup

For use on:

  • Industrial Floors /Workshops
  • Parking Decks
  • Densified / Trowel Finished Concrete
  • Gas Station Fuel Pads
  • Secondary Containment
  • Drive Through Concrete
  • Warehouse/ Factory Floors

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