Can You Put Asphalt Sealer on Concrete?

You can physically spread it, but you shouldn't. Asphalt driveway sealer is made to bond with asphalt, a flexible, oily, porous surface. Concrete is harder, denser, and chemically different, so asphalt-based and coal-tar-based sealers tend to grip poorly, then peel, flake, and track black specks onto shoes and floors. Some sealer makers state in their directions that the product is for asphalt only. It also turns concrete permanently black, and getting it back off is hard work. If you want to protect a concrete driveway, patio, or walkway, use a sealer made for concrete, such as a penetrating silane or siloxane sealer or an acrylic concrete sealer.

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Why Asphalt Sealer on Concrete Doesn't Work Well

Poor Bonding

Asphalt sealer contains asphalt or coal tar particles in water, plus clay and fillers. On asphalt, it soaks slightly into the oily surface and fuses with it. Concrete doesn't offer that kind of grip. The coating sits on top and tends to let go as it's walked on, driven on, and exposed to freeze-thaw.

Movement and Moisture

Concrete breathes. Moisture moves up through slabs from the ground. A film that doesn't let that moisture escape can blister or lift.

Peeling, Flaking, and Tracking

When the coating fails, it comes off in patches. Loose flakes and black dust get carried indoors on shoes, tires, and pet paws.

Hard to Undo

Once asphalt sealer is on concrete, removing it usually means scraping, chemical strippers, and pressure washing. Some staining often remains. Our guide on removing driveway sealer from concrete covers the process.

What About Concrete Sealers Tinted Black?

If you like the look of a black driveway but have concrete, you have a few options:

• Tinted concrete sealers or stains designed for concrete surfaces
• Concrete coatings that can be tinted
• Accepting the natural gray and using a clear protective sealer

Follow the product's directions for prep, application temperature, and recoating. Try it on a small, out-of-the-way section first so you can see the final color before committing.

What to Use on Concrete Instead

Sealer type	How it works	Good for
Penetrating (silane/siloxane)	Soaks in and repels water without a surface film	Driveways, freeze-thaw areas, natural look
Acrylic	Forms a thin film, can add sheen or color	Patios, walks, decorative concrete
Epoxy/urethane	Tough film coatings	Garage floors, indoor slabs

For outdoor concrete driveways in cold climates, penetrating sealers are a common choice because they help reduce water and salt intrusion without making the surface slick.

Signs Your Concrete Needs a Sealer

Concrete doesn't need sealing as often as asphalt, but it can benefit from it. Water that darkens the surface and soaks in quickly, flaking or pitting after winters with deicers, and stains that set in easily all suggest the surface would benefit from protection. A quick test: sprinkle some water on a dry section. If it beads up, an existing sealer is still working. If it soaks in and darkens the concrete within a minute or so, it's a candidate for a penetrating sealer. Always start with a clean, dry slab.

Where Asphalt and Concrete Meet

Many homes have an asphalt driveway that meets a concrete garage floor, sidewalk, or apron. When sealcoating the asphalt:

1. Tape or mask the concrete edge. Painter's tape and plastic sheeting help keep sealer off.
2. Cut in carefully with a brush along the joint.
3. Keep a bucket of water and a rag nearby. Wet sealer wipes off far more easily than dried sealer.
4. Don't let sealer run onto the concrete. Work away from the edge.
5. Seal the joint separately. Use a crack sealant or joint filler rated for the gap, not sealcoat.

What If You Already Sealed Concrete With Asphalt Sealer?

Don't panic, but act before more flakes come loose.

• Watch for peeling. If it's already coming up in areas, scrape loose material.
• Test a removal method on a small spot. Citrus-based sealer removers and pressure washing are common starting points. Follow product directions and wear gloves and eye protection.
• Consider leaving well-bonded areas alone if they look even, since stripping everything is a big job.
• Don't add another coat of asphalt sealer to cover the peeling. That just repeats the problem.

For peeling issues on asphalt itself, see our guide on driveway sealer peeling.

Asphalt vs Concrete Maintenance

The two materials need different care. Asphalt benefits from periodic sealcoating and crack filling. Concrete benefits from joint maintenance, a penetrating sealer every few years in harsh climates, and care with deicers. Our comparison of asphalt vs concrete driveways covers the bigger picture.

Bottom Line: Can You Put Asphalt Sealer on Concrete?

Putting asphalt sealer on concrete usually leads to peeling, tracking, and a black mess that's hard to remove. Use a concrete-specific sealer instead, mask off concrete edges when sealing asphalt, and clean up spills while they're still wet.