Aromatic Urethane 520™
Engineered for superior protection and flexibility, Aromatic Urethane 520 is a high-solids, moisture-cure polyurethane coating. Its elastomeric formulation creates a seamless, durable, and waterproof membrane that resists lateral movement and adapts to expansion and contraction for long-term performance.
- Forms a durable, weather-resistant waterproof membrane
- Excellent UV stability to help prevent premature degradation
- Superior adhesive and cohesive strength
- Accommodates thermal movement and substrate expansion
- High solar reflectivity helps reduce cooling costs
- Excellent elongation and tensile strength
- Superior resistance to dirt pick-up and discoloration
- Solids by Volume
- 70% ± 2%
- Elongation
- 350% ± 50%
- Tensile Strength
- 975± 25 psi
- Viscosity
- 2,000 cps
- Weight per Gallon
- 9.2 lbs. per gallon
- Flash Point
- 80° F
- Hardness (Shore A)
- 65, Shore A
- Permeability
- .02 perms
- Water Absorption
- 2.4%
- Minimum Application Temperature
- 40°F
- Dry Time
- Dry-to-touch: 6 hours, Tack-free: 8-12 hours, Recoat: 12-16 hours
- Service Temperature
- -50° to 200°F
- Clean Up
- Xylene
- Modified bitumen
- Metal
- TPO
- PVC
- EPDM
- Spray polyurethane foam
- Smooth built-up roofing
- Surface Preparation
Pressure wash the roof (2,500–3,500 psi) to remove dirt, debris, grease, mildew, and loose material. Ensure the surface is completely dry for proper adhesion.
Inspect and repair damaged areas. A primer may be required based on substrate age and condition.
- Mixing/Thinning
Mix thoroughly with a drill mixer for ~3 minutes for uniform consistency. If needed, thin up to 10% (1:10 ratio). Consult Technical Services for specific guidance.
- Application Methods
Apply using an airless hydraulic sprayer or a medium nap roller.
- Coverage Rates
Dries to the touch in 2–4 hours under normal conditions. Apply additional coats within 24–48 hours. Full cure occurs in 7–10 days, depending on temperature and humidity.
- Limitations/Precautions
Do not apply if surface temperature is below 40°F, as it may hinder curing. In cold weather, store indoors until use.
High humidity speeds curing; low humidity slows it. Avoid application if rain is imminent to prevent adhesion issues.
- Storage/Handling
Store in a cool, dry place, away from sunlight and heat. Keep containers sealed to prevent moisture exposure and premature curing.
While freezing rarely causes damage, extreme temperature fluctuations can affect consistency. Store in controlled conditions to prevent freezing.
- Cleanup/Disposal
Clean tools and equipment immediately after use with an appropriate solvent. Dried material may require mechanical removal.
Do not dispose of liquid material in drains or waterways. Follow local, state, and federal regulations for proper disposal of unused product and empty containers.
