Your concrete driveway takes a beating every single day — sun, rain, snow, salt, car tires, and Indiana’s brutal freeze-thaw cycles all work against it. The damage doesn’t happen overnight, but by the time it’s obvious, the repair bill is a lot bigger than the cost of sealing would have been.
Here are five warning signs that your concrete driveway is telling you it needs to be sealed — and what you can do about each one.
1. Surface Cracks Are Spreading
Hairline cracks in concrete are common, especially in Indianapolis where temperature swings between seasons are extreme. But when those cracks start growing — getting wider, branching out, or multiplying — it means water is getting inside the concrete and expanding when it freezes.
This is classic freeze-thaw damage, and it accelerates fast once it starts. Indianapolis averages over 100 freeze-thaw cycles per winter, and every cycle makes existing cracks worse.
What to do: If the cracks are still hairline to moderate (under ¼ inch), sealing now can stop them from spreading. A penetrating concrete sealer blocks moisture from getting in, which stops the freeze-thaw cycle from doing further damage. If cracks are large or structural, repair first — then seal.
2. You Can See Pitting or Spalling on the Surface
Pitting looks like small holes or rough, pockmarked areas on your driveway surface. Spalling is when chunks of the surface start flaking off, leaving rough, uneven patches. Both are signs that the top layer of your concrete is deteriorating.
The most common cause in Central Indiana? Deicing salt. Road salt and calcium chloride are incredibly aggressive on concrete surfaces. Salt draws moisture into the pores, then when that moisture freezes, the surface layer pops off.
What to do: Sealing creates a barrier that dramatically reduces salt and chloride penetration. Seal Now’s penetrating sealer forms a hydrophobic layer inside the concrete that repels moisture and dissolved salts — preventing the conditions that cause pitting and spalling in the first place.
3. Water Absorbs Into the Surface Quickly
Here’s a quick test anyone can do: pour a small amount of water on your driveway or patio. Watch what happens over the next 30–60 seconds.
If the water sits on top and slowly evaporates without soaking in, your concrete’s pore structure is still protected. If it absorbs quickly and you see the concrete darken where the water landed, the protection has worn off — moisture, salt, and contaminants are getting in.
A penetrating sealer works by filling and hardening the pore structure from within, so water can’t penetrate. Once that barrier breaks down, your concrete is exposed to freeze-thaw damage, salt intrusion, and staining all over again.
This test takes 30 seconds and tells you exactly where you stand.
4. Discoloration, Staining, or White Residue
If your driveway has uneven coloring — dark patches, oil stains that won’t wash out, or a chalky white film — the concrete is telling you it’s absorbing contaminants.
The white residue is called efflorescence. It happens when water moves through the concrete, dissolves minerals inside, and deposits them on the surface as it evaporates. It’s not just ugly — it’s proof that water is freely moving through your slab.
Oil stains that penetrate deep are another sign. Sealed concrete resists oil absorption because the pores are already occupied by the sealer.
What to do: Professional cleaning followed by a penetrating sealer will stop efflorescence and prevent future staining. The sealer resists oil, dirt, and dissolved minerals from penetrating the surface.
5. Your Driveway Is More Than 2–3 Years Old and Has Never Been Sealed
This one is straightforward. If your concrete is more than a couple of years old and has never been professionally sealed, it’s been unprotected through multiple Indiana winters. Even if it looks fine on the surface, moisture and salt have likely been working their way into the pores.
The good news: it’s almost never too late to seal. As long as the concrete is structurally sound (no major cracks or heaving), sealing now will protect it going forward and slow any damage that’s already begun.
What to do: Get a free estimate from Seal Now. We’ll assess your driveway’s condition and recommend the right approach — whether that’s sealing immediately or addressing repairs first.
What Happens If You Don’t Seal Your Driveway?
Left unprotected, a concrete driveway in Indianapolis will typically show significant deterioration within 5–10 years. The progression looks like this:
- Years 1–3: Surface looks fine but is absorbing water and salt with every storm and winter treatment.
- Years 3–5: Hairline cracks appear. Minor discoloration. Efflorescence starts showing up in spring.
- Years 5–8: Cracks widen. Pitting and spalling begin, especially near the street where salt exposure is highest.
- Years 8–10+: Major surface damage. Sections may need to be replaced. Full driveway replacement costs $3,000–$8,000+ in Indianapolis.
Sealing your driveway costs a fraction of replacement — typically $1 to $3 per square foot — and protects it for years. It’s one of the highest-ROI home maintenance investments you can make.
Seal Now’s Approach
At Seal Now, we use a penetrating concrete sealer that chemically bonds with your concrete — it doesn’t sit on top as a film that peels or wears off. Our sealer:
- Blocks moisture and chloride penetration
- Resists freeze-thaw and salt damage
- Prevents mold, mildew, and organic growth
- Leaves a natural matte finish — no shine, no film
- Is backed by a 25-year manufacturer guarantee
Every project starts with a professional pressure wash and surface prep, followed by sealer application to clean, dry concrete. It’s a straightforward two-step process. Call us at (317) 548-2002 or request a free quote online.
Frequently Asked Questions
How do I know if my concrete is sealed or not?
Do the water test: pour a small amount of water on the surface. If it beads up, there’s likely an existing sealer. If it soaks in and darkens the concrete, the surface is unsealed or the previous sealer has worn off.
Can I seal a driveway that already has cracks?
Yes, as long as the cracks are minor (under ¼ inch). Sealing prevents existing cracks from getting worse by blocking moisture penetration. For larger cracks, we recommend repair before sealing.
Does sealing fix existing damage?
Sealing prevents future damage — it doesn’t reverse damage that’s already occurred. If your concrete has spalling or pitting, those areas won’t fill in. But sealing stops the deterioration from progressing further.
How soon after pouring new concrete should I seal it?
New concrete should cure for at least 28 days before sealing. After that, the sooner you seal, the better — your new driveway is most vulnerable when it’s brand new and has never been protected.
Is concrete sealing worth it for an older driveway?
Absolutely — as long as the concrete is structurally sound. Sealing an older driveway that’s still in decent shape is far cheaper than replacing it later. Even 10-year-old concrete benefits from sealing if it hasn’t deteriorated too far.