Flex Seal Crack Filler 1 qt - Best Overall
Flex Seal’s crack filler comes in a 1‑quart bottle with a thick, polymer‑based formula that adheres to both hot and cold asphalt. It can be applied with a putty knife or a caulking gun and cures to a flexible, waterproof seal in about 30 minutes. The product is rated for cracks up to 1/4 inch wide and resists UV degradation for up to three years.
Check price on Amazon →Discover the top asphalt crack fillers that give lasting repairs and protect your driveway this year.
When cracks appear in your driveway or parking lot, water can seep in, freeze, and expand, causing permanent damage. Choosing the right asphalt crack filler helps seal the gap, prevent moisture intrusion, and extend the life of your pavement without costly resurfacing.
We compared five popular fillers based on ease of use, cure time, flexibility, and long‑term durability. Below you’ll find a quick comparison, detailed reviews, and buying tips so you can select the product that matches your budget and project size.
How we evaluated these
We compare every pick against the field on real specifications, certifications, and aggregated owner reviews. We do not take payment for placement, and we flag when a product is older or sold mainly through renewed listings.
The shortlist
| Pick | Best for | Score | |
|---|---|---|---|
| Flex Seal Crack Filler 1 qt - Best Overall | Check price | ||
| Rust-Oleum 0.5 qt Asphalt Sealant - Best Budget | Check price | ||
| Gardner-Gibson CrackSeal 1 qt - Best Professional | Check price | ||
| Black Jack Asphalt Patch 5 lb - Best Heavy Duty | Check price | ||
| Liquid Asphalt 1 qt - Best Versatile | Check price |
Each pick, examined
Flex Seal Crack Filler 1 qt - Best Overall
Flex Seal’s crack filler comes in a 1‑quart bottle with a thick, polymer‑based formula that adheres to both hot and cold asphalt. It can be applied with a putty knife or a caulking gun and cures to a flexible, waterproof seal in about 30 minutes. The product is rated for cracks up to 1/4 inch wide and resists UV degradation for up to three years.
Rust-Oleum 0.5 qt Asphalt Sealant - Best Budget
Rust‑Oleum offers a compact 0.5‑quart tube that is ideal for small driveway cracks and sidewalk repairs. The fast‑dry, solvent‑based sealant bonds within 15 minutes and forms a rubber‑like membrane that expands with temperature changes. It is compatible with most asphalt surfaces and does not require a primer.
Gardner-Gibson CrackSeal 1 qt - Best Professional
Gardner‑Gibson’s CrackSeal is a premium, polymer‑modified acrylic filler designed for contractors and serious DIYers. The 1‑quart container includes a built‑in primer that prepares the crack for maximum adhesion. It can fill gaps up to 1/2 inch, cures in 45 minutes, and remains flexible for up to five years, making it a top choice for high‑traffic areas.
Black Jack Asphalt Patch 5 lb - Best Heavy Duty
Black Jack’s asphalt patch is a 5‑pound, tar‑based compound that excels at filling larger voids and potholes. It can be heated with a propane torch or applied cold for quick repairs. The patch hardens to a dense, load‑bearing surface within two hours and is rated for temperatures from -20 °F to 140 °F, making it suitable for extreme climates.
Liquid Asphalt 1 qt - Best Versatile
Liquid Asphalt is a clear, pourable sealant that works on both horizontal cracks and vertical joints such as curb edges. Its low‑viscosity formula flows into tight spaces without sagging, and it cures to a flexible, waterproof layer in about one hour. The product is also safe for use on concrete and brick when a compatible primer is applied.
Buying considerations
What to consider
When selecting an asphalt crack filler, start by measuring the width and depth of the cracks you need to repair. Fillers that cure to a flexible membrane are ideal for areas that experience temperature swings, while rigid, tar‑based patches are better for larger potholes that must support heavy loads. Consider the cure time; products that set within an hour let you finish a driveway repair in a single day.
What to consider
Another important factor is the application method. If you prefer a squeeze‑tube or caulking gun, look for a product packaged for that use, such as Flex Seal or Rust‑Oleum. For larger jobs, a bulk patch like Black Jack provides the volume needed to fill deep voids. Finally, check whether a primer is required; built‑in primers simplify the process, but separate primers can give extra bonding strength for very old or oily surfaces.
Questions answered
Yes, most modern fillers are formulated to cure in a wide temperature range, but follow the manufacturer’s recommended temperature limits for optimal adhesion.
Gardner-Gibson CrackSeal includes a built-in primer, while Flex Seal and Rust-Oleum recommend a separate primer for deep or oily cracks.
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