Asphalt Roof Coatings
Aluminum-pigmented elastomeric coating solution for built-up roofs and modified bitumen systems
Key Benefits
- ✓ 0.68 initial solar reflectance with aluminum pigment
- ✓ SBS rubber modified for enhanced flexibility
- ✓ Specifically formulated for BUR and modified bitumen
- ✓ Reduces UV degradation and heat damage
- ✓ 300% elongation and tensile strength per ASTM D-412
Types of Asphalt Coatings
Solvent-Based
- • Quick drying
- • Better penetration
- • Works in cooler temperatures
- • Higher VOC content
- • Stronger odor
Water-Based Emulsion
- • Environmentally friendly
- • Lower VOCs
- • Easier cleanup
- • Requires warmer application temps
- • Longer dry time
Best Applications
Asphalt coatings are ideal for:
- • Built-up roofing (BUR) systems
- • Modified bitumen restoration
- • Older asphalt shingle roofs
- • Gravel roof restoration
- • Budget-conscious waterproofing projects
Technical Specifications
| Property | Typical Value |
|---|---|
| Solids Content | 40-60% |
| Tensile Strength | 50-150 psi |
| Elongation | 100-300% |
| Application Temperature | 50°F minimum |
| Coverage Rate | 1-2 gallons per 100 sq ft |
Aluminum-Pigmented Options
Aluminum asphalt coatings (also called "silver coatings") provide additional benefits:
- • Enhanced UV protection
- • Improved reflectivity (50-70%)
- • Reduced surface temperature
- • Extended coating life
- • Better aesthetics than black asphalt
Installation Considerations
Important Notes:
- • Surface must be clean and dry
- • Not compatible with single-ply membranes
- • Black coatings absorb heat (consider aluminum)
- • Recoating needed every 3-5 years
- • May require multiple coats for proper thickness
Limitations
Consider these limitations:
- • Lower reflectivity than modern elastomerics
- • Shorter lifespan (5-10 years)
- • Limited color options
- • Can become brittle with age
- • Environmental concerns with solvent-based options
Cost Analysis
Asphalt coatings are the most economical option at $0.50-1.50 per square foot installed. While they require more frequent reapplication, they remain popular for budget-conscious projects and temporary solutions.
Best Value For:
Existing asphalt-based roofs needing short to medium-term protection at minimal cost.
Upgrade Path
Many building owners start with asphalt coatings then upgrade to modern elastomeric systems. Consider transitioning to:
- • Acrylic for better reflectivity and energy savings
- • Silicone for ponding water resistance
- • Polyurethane for high-traffic areas
Get Your Coating Recommendation
Compare asphalt coating with modern alternatives for your specific roof. Our free analysis helps you make the right choice.