ProFlex 680E One-Component Exposed-Grade Polyurethane Waterproof Coating
ProFlex 680E is a premium, one-component, exposed-grade polyurethane waterproof coating engineered for direct exposure to UV radiation, weather, and foot traffic. Unlike traditional waterproofing membranes that require protective toppings or coverings, ProFlex 680E is formulated to withstand long-term outdoor exposure while maintaining exceptional flexibility, waterproofing performance, and aesthetic appearance.
This advanced moisture-cure polyurethane technology creates a seamless, elastomeric membrane that bridges cracks, accommodates substrate movement, and provides reliable waterproofing for decades.
Key Advantages
Exposed-Grade Formulation: UV stable for direct outdoor exposure; no protective topping required
One-Component Simplicity: No mixing, no pot life concerns; open, stir, and apply
Superior Waterproofing: Forms a seamless, monolithic membrane with no seams or joints
Exceptional Flexibility: Remains elastic from -40°F to 250°F (-40°C to 121°C); bridges cracks up to 1/8″ (3mm)
Moisture-Cure Technology: Cures by reacting with atmospheric humidity; ideal for field applications
100% Solids (Zero VOC) : Solvent-free; safe for occupied buildings and environmentally compliant
UV & Weather Resistant: Non-yellowing, non-chalking formulation with excellent gloss retention
Foot Traffic Resistant: Withstands maintenance traffic and light pedestrian use
Chemical Resistant: Resists acids, alkalis, salts, and industrial pollutants
Rapid Curing: Tack-free in 2-4 hours; fast return to service
Excellent Adhesion: Bonds to concrete, metal, wood, foam, and many existing roofing membranes
Technical Specifications
| Property | Value |
|---|---|
| Chemistry | One-component moisture-cured aliphatic polyurethane |
| Appearance | Translucent to colored liquid |
| Color Options | Clear, Gray, White, Tan, Custom colors available |
| VOC Content | 0 g/L (zero VOC) |
| Solids by Volume | 100% ±2% |
| Viscosity | 3,000 – 4,000 cP (brushable/rollable) |
| Mix Ratio | Single component – no mixing required |
| Application Temperature | 35°F – 120°F (2°C – 49°C) |
| Substrate Temperature | Above dew point, minimum 35°F (2°C) |
| Humidity Requirement | Minimum 30% RH for proper cure |
| Tack-Free Time | 2 – 4 hours at 77°F (25°C), 50% RH |
| Recoat Window | 4 – 24 hours; after 24 hours, light sanding required |
| Full Cure | 7 days |
| Tensile Strength | 2,800 psi (ASTM D412) |
| Elongation | 550% (ASTM D412) |
| Tear Strength | 400 pli (ASTM D624) |
| Hardness | Shore A 75 – 80 |
| Water Absorption | < 1% (7-day immersion) |
| Permeability | < 0.1 perms (ASTM E96) |
| UV Resistance | 3,000+ hours QUV (ASTM G154) – no significant change |
| Coverage | 80 – 100 ft²/gallon at 20 mils wet (20 mils dry = 100% solids) |
| Recommended DFT | 20 – 60 mils (1 – 3 coats) |
| Crack Bridging Ability | Up to 1/8″ (3mm) dynamic cracks |
| Packaging | 1 gallon, 5 gallon, 55 gallon drums |
Applications
Roofing
Flat roofs, low-slope roofs
Metal roofs, concrete roofs
Spray polyurethane foam (SPF) roofing systems
Modified bitumen and BUR restoration
Balconies & Decks
Pedestrian traffic surfaces
Terrace decks, rooftop patios
Walkways, platforms
Exterior Walls
Below-grade to above-grade transition
Foundation walls, retaining walls
Exterior insulation finish systems (EIFS)
Waterproofing
Plaza decks, parking structures
Planters, green roofs
Water features, fountains
Restoration
Recoat aging urethane membranes
Repair and refurbish existing waterproofing
Seamless over existing coatings
Why Exposed-Grade Matters
Traditional polyurethane waterproofing membranes often require a protective topcoat or covering layer to shield them from UV degradation. ProFlex 680E eliminates this requirement through advanced aliphatic polyurethane chemistry.
Aliphatic vs. Aromatic Polyurethane:
| Property | Aromatic (Traditional) | Aliphatic (ProFlex 680E) |
|---|---|---|
| UV Stability | Poor – yellows and chalks | Excellent – color stable |
| Exposed Use | Requires protective topcoat | Direct exposure approved |
| Color Options | Limited to dark colors | Wide range, including light/reflective |
| Durability | Good with protection | Excellent without protection |
| Lifecycle Cost | Higher (requires topcoat) | Lower (single-system) |
Benefits of Exposed-Grade Design:
Eliminates additional materials and labor
Simplifies specification and installation
Reduces maintenance requirements
Allows reflective colors for energy savings
Facilitates easy inspection and repair
Performance Data
| est | Method | Result |
|---|---|---|
| Tensile Strength | ASTM D412 | 2,800 psi |
| Elongation | ASTM D412 | 550% |
| Tear Strength | ASTM D624 | 400 pli |
| Hardness | ASTM D2240 | Shore A 78 |
| Adhesion to Concrete | ASTM D4541 | > 350 psi (concrete failure) |
| Adhesion to Steel | ASTM D4541 | > 1,000 psi |
| Adhesion to SPF Foam | ASTM D4541 | Foam tear |
| Water Absorption | ASTM D570 | 0.6% (7 days) |
| Water Vapor Permeability | ASTM E96 | < 0.1 perms |
| Abrasion Resistance | ASTM D4060 (CS-17, 1000g, 1000 cycles) | < 60 mg loss |
| Crack Bridging | ASTM C836 | Pass at -20°F |
| UV Resistance | ASTM G154 (QUV) | 3,000+ hours, no cracking or peeling |
| Accelerated Weathering | ASTM G155 (Xenon) | 2,500+ hours, ΔE < 2.0 |
| Salt Spray Resistance | ASTM B117 | 2,000+ hours |
| Chemical Resistance | 30-day immersion | Excellent (see chart) |
Why Choose ProFlex 680E?
1. True Exposed-Grade Performance
Unlike competitive products that require sacrificial topcoats, ProFlex 680E is formulated from the ground up for permanent UV exposure. Save time, money, and labor.
2. One-Component Reliability
No mixing errors, no short pot life, no wasted material. Perfect for contractors of all skill levels.
3. Seamless Monolithic Membrane
No laps, no seams, no weak points. Liquid-applied means total waterproofing integrity even on complex details.
4. Exceptional Elongation with High Strength
550% elongation means it moves with the substrate. 2,800 psi tensile strength means it withstands abuse. The perfect balance.
5. Sustainable and Safe
Zero VOC, 100% solids means no solvent emissions during application. Contributes to LEED credits and green building certification.
Frequently Asked Questions
Q: Can ProFlex 680E be used as a standalone roof coating?
A: Yes. ProFlex 680E is specifically designed for exposed applications. No additional UV protection is required.
Q: What is the expected service life?
A: With proper application and recommended film thickness, 15-20 years of service life is typical. Actual longevity depends on exposure conditions and maintenance.
Q: Can it be applied over existing roofing materials?
A: Yes, provided the existing substrate is sound, clean, and compatible. Always perform an adhesion test. ProFlex 680E adheres well to most cured urethanes, modified bitumen, BUR, metal, and concrete.
Q: Is it suitable for green roofs and planters?
A: Absolutely. ProFlex 680E is root-resistant and withstands exposure to fertilizers and organic acids. For planters, use ProFlex Root Barrier fabric for additional protection.
Q: How does it compare to acrylic roof coatings?
A: Acrylics are water-based, lower cost, but have limited elongation (<300%) and can pond water. ProFlex 680E offers superior elongation, ponding water resistance, and longer service life.
Q: Can I apply it in cold weather?
A: Minimum application temperature is 35°F (2°C). However, cure time will be extended. For cold weather applications, consult technical support.
Q: Is it slip-resistant?
A: The standard finish provides moderate slip resistance. For high-slip areas, broadcast ProFlex Non-Skid Aggregate into the wet final coat.
Q: How do I calculate how much I need?
A: Coverage: 100 ft²/gallon at 20 mils. Measure roof area in square feet, divide by 100, multiply by number of coats. Example: 5,000 ft² roof, 2 coats = (5,000 ÷ 100) × 2 = 100 gallons.
Technical Support & Resources
Our team of waterproofing specialists provides comprehensive technical support:
Product selection assistance
Application training and site visits
Custom color matching
Troubleshooting and quality control
Specification writing assistance