Types of Asphalt Sealers
Last updated: 2026-10-01
Types of Asphalt Sealers: Complete Guide to Selection, Costs & Performance
The 5 main types of asphalt sealers are coal tar (refined tar), asphalt emulsion (AC-20/SS-1h), petroleum-based (cutback), acrylic polymer, and polymer-modified emulsion. Coal tar sealers cost $0.12–$0.30 per sq ft, asphalt emulsion sealers run $0.08–$0.20 per sq ft, and acrylic sealers average $0.25–$0.45 per sq ft. Material coverage typically runs 50–80 sq ft per gallon per coat, and a properly sealed driveway lasts 2–4 years before resealing is required.
This guide breaks down every asphalt sealer type by chemistry, performance data, pricing per ton and per square foot, drying time, and best-use application—so contractors, distributors, and facility managers can specify the right product the first time.
1. Coal Tar Sealer (Refined Coal Tar Emulsion)
Coal tar sealer—often called refined tar or RT-12—is a petroleum-derived coating produced from coal carbonization. It remains the benchmark for fuel resistance and jet-black appearance.
Key performance data:
| Property | Coal Tar Sealer | Asphalt Emulsion | Acrylic |
|---|---|---|---|
| Fuel/oil resistance | Excellent | Poor–Fair | Fair |
| UV fade resistance | Excellent | Moderate | Good |
| Dry time (70°F/50% RH) | 4–8 hrs | 2–6 hrs | 1–2 hrs |
| Coverage per gallon | 50–80 sq ft | 60–90 sq ft | 80–120 sq ft |
| Lifespan per application | 3–4 years | 2–3 years | 2–3 years |
| Cost per sq ft (material) | $0.12–$0.30 | $0.08–$0.20 | $0.25–$0.45 |
| Bulk price per ton | $350–$550 | $280–$450 | $900–$1,400 |
Best for:
- Commercial parking lots with heavy vehicle traffic
- Gas stations and auto service areas (fuel spill resistance)
- Airport aprons and municipal lots
- Cold climates (superior freeze-thaw flexibility)
Trade-offs:
- Contains PAHs (polycyclic aromatic hydrocarbons) — restricted in some US states and EU markets
- Higher odor during cure
- Being phased out in parts of Canada and the EU due to runoff environmental concerns
2. Asphalt Emulsion Sealer (SS-1h / AC-20 Based)
Asphalt emulsion sealer is manufactured by suspending asphalt cement in water with emulsifying agents. It is the most widely sold sealer type in North America and the most cost-effective.
Specifications and use:
| Grade | Use Case | Solids Content | Cure Time |
|---|---|---|---|
| SS-1h | Driveways, light lots | 55–65% | 2–6 hrs |
| AC-20 base | Commercial lots | 60–70% | 4–8 hrs |
| CRS-2 | Heavy-duty blends | 65–72% | 6–10 hrs |
Key numbers:
- Application rate: 0.10–0.15 gallons per sq yd per coat (2 coats recommended)
- Bulk pricing: $280–$450 per ton FOB; delivered $420–$620 per ton
- Container pricing: $25–$45 per 5-gallon pail
- Dry to touch: 2–4 hrs at 70°F; full cure 24–48 hrs
- Lifespan: 2–3 years, longer in mild climates with polymer additives
Best for:
- Residential driveways
- Light-to-medium commercial lots
- Budget-sensitive municipal projects
- Markets where coal tar is restricted
Trade-offs:
- Lower fuel resistance than coal tar
- Fades to gray over 12–18 months
- Requires sand or polymer additive to improve durability
3. Petroleum-Based / Cutback Asphalt Sealer
Cutback sealers use petroleum solvents (naphtha, kerosene, or mineral spirits) to liquefy asphalt for cold application. As VOC regulations tighten, usage is declining but still common in industrial contexts.
Data snapshot:
| Property | Value |
|---|---|
| Solvent content | 15–35% by volume |
| VOC level | 250–650 g/L |
| Dry time | 1–3 hrs (fast set) |
| Coverage | 55–75 sq ft/gal |
| Cost per sq ft | $0.15–$0.35 |
| Bulk price per ton | $400–$650 |
Best for:
- Cold-weather applications (down to 40°F)
- Crack filling and spot repairs
- Priming before overlay
Trade-offs:
- High VOC — banned or restricted in CA, NY, NJ, MD and most EU states
- Flammable during application
- Shrinks and cracks faster than emulsion products
4. Acrylic Polymer Sealer
Acrylic sealers are water-based, environmentally compliant coatings that cure to a translucent or tinted film. They offer the fastest dry time and lowest VOC footprint of all sealer types.
Performance table:
| Property | Acrylic Sealer |
|---|---|
| VOC content | <100 g/L |
| Solids content | 20–35% |
| Dry time | 30 min–2 hrs |
| Coverage per gallon | 80–120 sq ft |
| Lifespan | 2–3 years |
| Cost per sq ft | $0.25–$0.45 |
| Bulk price per ton | $900–$1,400 |
| Recoat window | 4–24 hrs |
Best for:
- Decorative driveways and residential projects
- LEED-certified or eco-sensitive commercial sites
- Indoor or confined-space applications
- High-traffic pedestrian areas (airports, malls)
Trade-offs:
- Highest cost per square foot
- Poor fuel/oil resistance
- Requires multiple coats for full coverage
5. Polymer-Modified Emulsion Sealer
Polymer-modified emulsion (PME) blends asphalt emulsion with SBR latex, styrene-butadiene, or acrylic polymers to combine the cost of emulsion with performance closer to coal tar.
Comparison vs. standard emulsion:
| Metric | Standard Emulsion | Polymer-Modified |
|---|---|---|
| Flexibility @ 0°F | Fair | Excellent |
| Abrasion resistance | Moderate | High |
| Crack resistance | Moderate | High |
| Dry time | 2–6 hrs | 2–5 hrs |
| Lifespan | 2–3 yrs | 4–6 yrs |
| Cost per sq ft | $0.08–$0.20 | $0.18–$0.32 |
| Bulk price per ton | $280–$450 | $480–$780 |
Best for:
- High-traffic commercial lots (500+ vehicles/day)
- Freeze-thaw climates
- Airports, warehouses, logistics yards
- Rental properties needing longer recoat intervals
Why it wins on ROI: While PME costs 45–70% more per ton than standard emulsion, its 2x lifespan halves long-term labor and material costs—saving property managers $0.10–$0.18 per sq ft annually.
Selection Matrix: Which Asphalt Sealer Type Wins for Your Project?
| Project Type | Recommended Sealer | Est. Cost / 1,000 sq ft |
|---|---|---|
| Residential driveway | Asphalt emulsion | $80–$200 |
| Residential, high-end | Acrylic | $250–$450 |
| Retail parking lot | Polymer-modified | $180–$320 |
| Gas station / auto shop | Coal tar | $120–$300 |
| Warehouse / logistics | Polymer-modified | $180–$320 |
| Eco-sensitive site | Acrylic | $250–$450 |
| Cold climate (<32°F) | Coal tar or PME | $120–$320 |
Cost Drivers: Labor, Tonnage & Application
Beyond material chemistry, three factors move the needle on final project cost:
- Labor: $0.10–$0.25 per sq ft (accounting for 60–75% of total sealed cost)
- Material volume: 1 ton of sealer typically covers 8,000–12,000 sq ft per coat
- Sand additive: +$15–$30 per ton for slip resistance and durability
- Surface prep: crack fill, oil spot priming, and power washing add $0.05–$0.15 per sq ft
- Number of coats: 2 coats standard for commercial; 1 coat acceptable for low-traffic residential with PME
For contractors sourcing bulk materials, freight cost from Gulf Coast refineries to inland US destinations runs $40–$90 per ton by truckload (24 tons), or $25–$55 per ton by rail for 100+ ton orders.
FAQ: Asphalt Sealer Types
Q1: What is the best type of asphalt sealer?
Coal tar sealer offers the best fuel resistance and lifespan (3–4 years) for commercial use, while polymer-modified emulsion delivers the best balance of cost ($0.18–$0.32/sq ft) and performance (4–6 year lifespan). For eco-sensitive sites, acrylic is the top compliant choice.
Q2: How much does asphalt sealer cost per ton?
Bulk asphalt sealer ranges from $280–$450 per ton for standard emulsion, $350–$550 per ton for coal tar, $480–$780 per ton for polymer-modified, and $900–$1,400 per ton for acrylic. Delivered prices add $40–$90 per ton for truck freight.
Q3: How many square feet does 1 ton of sealer cover?
One ton of asphalt sealer typically covers 8,000–12,000 sq ft per coat, depending on solids content and dilution ratio. Two-coat applications on commercial lots should plan for 4,000–6,000 sq ft per ton.
Q4: How long before I can drive on a sealed driveway?
Drive time depends on sealer type: acrylic 24 hours, asphalt emulsion 24–48 hours, coal tar 48–72 hours, and polymer-modified 24–48 hours. Full cure takes 30–90 days, but light vehicle traffic is typically allowed after the initial dry window.
Q5: Is coal tar sealer being banned?
Yes—coal tar sealer is banned or restricted in Minnesota, Washington, Wisconsin, Illinois, Maryland, New York, and across the EU due to PAH runoff concerns. Many specifiers in restricted markets now switch to polymer-modified emulsion as the closest performance substitute.
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