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CoverSeal AC250 WB Acrylic Natural Stone Sealer, Gloss Finish


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Location : Interior/Exterior
Task : Floor/Deck
Application : 3/8” nap roller, or low-pressure sprayer.
Surface : Concrete, Natural Stone Hard Surfaces
Base : Water Based
Drytime : 45-60 min
Coverage : Porous surface 300-350 ft²/gal (7.3-8.5 m²/l) Dense surface 400-600 ft²/gal (9.8-14.7 m²/l)
Finish : Gloss

CoverSeal AC250 High Gloss, Wet Look, Water-Based Natural Stone Sealer

A Water-Based  Gloss Wet Look Natural Stone Sealer For Interior and Exterior Hard Surfaces

This acrylic natural sealer is available in a Matte finishes as well.

What Every-Day Signs Indicate You Need A Product Like CoverSeal AC250?

If you have a concrete, hard-floor, terrazzo or natural stone surface, and you want to protect it from stains, heel marks or scuff marks, and make it easier to clean and maintain, then CoverSeal AC250 Water-Based acrylic Sealer is the right product for you.

What Is CoverSeal AC250 Water-Based, Acrylic Floor Sealer?

CoverSeal AC250 is a water-based acrylic sealer that was developed specifically to protect and seal concrete, terrazzo and natural stone surfaces.

It’s very stain resistant and has excellent water resistance.

So if you have a concrete surface, and you’re seeing signs of water-marking, staining or dusting, CoverSeal AC250 provides a very effective seal and protection against those types of problems.

Is CoverSeal AC250 A Commercial Product, Consumer Product Or Both?

The AC250 is a product that can be used both for commercial and consumer residential applications.

It’s a one-part sealer. It’s water-based, so it’s easy to use, and it’s a very tough and durable sealer.

This means that you get the benefits of a professional-grade sealer that can also be used in residential applications.

What Are The Typical Situations Where Someone Would Use CoverSeal AC250?

CoverSeal AC250 is a hard surface sealer.  So it’s useful where you have concrete – either polished or unpolished – or where you’ve got terrazzo or natural stone.

In a commercial environment that could be:

  • A restaurant
  • The entranceway to commercial buildings
  • A warehouse
  • A workshop
  • A grocery store

All these surfaces are prime examples of commercial applications where CoverSeal AC250 is a perfect solution.

Obviously, in these high foot-traffic situations, you want to protect against:

  • Staining
  • Heel marks
  • Tire scuffing

The goals in these situations are not only to clean, but also to make those surfaces much easier to maintain, particularly where you’ve got high traffic or where they’re susceptible to staining.
And that’s the function of the AC250. It works very well in those applications.

It’s easy to apply. It’s environmentally friendly. And it’s very durable, so it leaves a longer-lasting seal on your surfaces.

Why Does CoverSeal AC250 Produce Better Real-World Results Than Store-Bought Brands?

There’s a number of issues you’ll find with acrylic sealers that you can purchase from a D.I.Y. outlet or a big box store.

  • Firstly, not all are stain-resistant.

Those that possess some semblance of resistance to stains provide only weak, temporary levels of protection. More specifically, they don’t “hold out” stains for very long.  In some cases, there are only a few hours before stains penetrate through their barrier, and start setting into the underlying surface.

  • Secondly, they don’t provide good water resistance.

We often hear complaints from first-time customers about their previous use of those products. They cite product failures like water-marks, skid marks, and other signs of wear and tear showing up shortly after application.  A typical example is if you leave a damp mop or cloth, or you spill water on the floor, you start seeing watermarks shortly.

  • The third issue is the inability of store-bought sealers to bond to smooth and polished surfaces.

Due to their inferior formulations, they require a lot of surface prep to perform well.

  • And the fourth issue is about the UV resistance of these products.

Due to poor ingredients and low-quality formulations, they can’t handle UV exposure very well.  This means they can’t be used outside.

CoverSeal AC250 contains a very focused formula to solve all of these problems you’ll experience with off-the-shelf sealers.

We use a proprietary combination of special polymer, modifiers, and film-formers to address those four issues.

It’s a product that is:

  1. Highly stain-resistant
  2. Very UV resistant
  3. Extremely water resistance
  4. And it bonds very well to polished and smooth surfaces (such as terrazzo, concrete, natural stone).

It’s an excellent sealer that can be used interior and exterior, and resists harsh stains, and will hold up and last longer than store-bought products.

When It Comes To Applying CoverSeal AC250 To A Surface, What Are The Recommended Steps?

CoverSeal AC250 is an easy to use product.  But it’s important to carry out the right surface prep. It bonds very well to smooth and polished surfaces.  There’s no need to etch or grind the surface, but it needs to be clean.

We recommend that you clean the surface with a neutral cleaner or a degreaser.   Scrub the floor if necessary to remove any topical or current stains or blemishes.  Use something like a scrubbing pad, then rinse it off and let it dry.

Once the surface is clean and dry, then the product can be applied using a nap roller, a pump-up sprayer, or a flat mop.  We recommend you apply it in thin coats. Each coat takes roughly 20 to 40 minutes to dry.

We strongly recommend using a minimum of 2 coats to get a good seal.  However, you can apply up to 4 or more coats, if you want to get extra shine.

On the final coat, you should allow it to dry for about 2 hours before you walk on it.  If you’re opening that area to heavy foot traffic, we recommend 6 to 8 hours of dry time before use.  If the surface will experience vehicular traffic, it’s best to let it dry for 24 hours.

How Does CoverSeal AC250 Interact With 3rd Party Products Or Product Types?

The AC250 sealer should be compatible with most 3rd party products on the market.

However, when using it on surfaces that have been exposed to:

  • Densifiers
  • Concrete stains
  • Existing sealers
  • Acrylic sealers
  • Floor finishes
  • Or an epoxy seal…

We always recommend that you do a little test – on a small area of the surface – to confirm there are no adverse effects.

The one product type we recommend not using CoverSeal AC250 with is a Concrete Impregnators or silicone type sealers. These types of products are designed to repel water-based solutions. As such, they will repel CoverSeal AC250. So stay away from those.

With that said, please follow our previous recommendation of always doing a test on a small area of your surface to confirm everything looks and works perfectly – before you apply the product to your entire hard surface.


  • Wet look non yellowing sealer
  • Highly water repellant
  • Beautifies and protects faded tile
  • Repels oil and stains
  • V.O.C. compliant
  • Abrasion resistant
  • Zero odor
  • Makes surface easier to clean
  • Hot tire pick up resistant

Typical Uses

  • Saltillo
  • Mexican tile
  • Unglazed tiles
  • Slate
  • Travertine
  • Concrete floors
  • Terrazzo
  • Colored and stamp concrete
  • Natural stone


 Interior or exterior use.

Shelf Life

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

Theoretical Coverage

Porous surface 300-350 ft²/gal (7.3-8.5 m²/l)
Dense surface 400-600 ft²/gal (9.8-14.7 m²/l)
A two-coat application is recommended for porous substrates.

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Frequently Asked Questions

How to repair or recoat GlazeGuard?

GlazeGuard is a tough clear sealer and very hard wearing. It tends to keep its shine for a long time but it can still be scratched. Especially if you drag sharp objects, like heavy kitchen appliances or point loads like table legs or chair legs.

To spot repair or recoat entire area it is not necessary to strip the sealer, you just need to sand or scrub the surface clean so it can be top coated. Sand with 120 grit sand paper or scrub with black pad and GlossGlean neutral cleaner. Clean off the dust or residue and apply a top coat. For more detailed instructions see GlazeGuard Maintenance instructions

Cleaning GlazeGuard?

GlazeGuard when fully cured has a hard surface so dirt does not easily stick to it. You don’t need to use aggressive cleaners. An part of maintaining your floor is to use dust mop or “swiffer” type microfiber mop to keep sand and dirt off the floor. After that to wash the floor you can use neutral clean or mild liquid detergents, light vinegar solutions, or light ammonia solutions.

Stay away from solvents like Paint strippers, Acetone and Xylene. If you do have use concentrated cleaners/degreasers. Clean up residue right away. In general make sure all standard floor cleaners are diluted in accordance with manufactures instructions. For more information see GlazeGuard Maintenance instructions.

CoverSeal AC250 Gloss Photos

CoverSeal AC250 Gloss Videos

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