The Black Jack Elasto-Kool 700 Elastomeric Roof Coating in White is a high-build, flexible coating designed to protect and extend the life of flat and low-sloped roofs. This guide outlines its key features, performance characteristics, application methods, and maintenance considerations to help builders, contractors, and homeowners make informed decisions. Emphasizing durability, reflectivity, and ease of use, the Elasto-Kool 700 is commonly chosen for its ability to seal leaks, resist weathering, and reduce energy costs through better roof reflectivity and heat management.
Product Overview
The Black Jack Elasto-Kool 700 is a water-based elastomeric roof coating formulated to provide a seamless, flexible membrane over substrates such as built-up roofs (BUR), modified bitumen, single-pply membranes, and concrete surfaces. Its white finish contributes to high solar reflectivity, helping to minimize interior cooling loads on commercial and residential structures. The product is designed to bridge minor substrate cracks and provide a weather-tight seal against wind-driven rain and UV exposure. Elasto-Kool 700 is commonly sold in ready-to-use pails or packaged for field mixing, depending on regional distribution.
Key Features and Benefits
High Elasticity and Flexibility: The elastomeric film flexes with roof movement, reducing the risk of cracking and delamination during temperature cycling. Excellent elongation properties help accommodate substrate movement without losing adhesion.
White Reflectivity: The white coating reflects a large portion of solar radiation, which can lower rooftop temperatures and contribute to lower cooling costs in hot climates. This reflective capability also helps reduce aging from UV exposure.
Water Resistance and Sealing: Elasto-Kool 700 creates a seamless barrier that sheds water and resists wind-driven infiltration. It is designed to seal minor leaks and protect against moisture intrusion.
Durability Against Weather: The coating is formulated to withstand rain, UV exposure, and temperature extremes common in American climates, contributing to a longer roof life when properly maintained.
Compatibility: It adheres to a variety of common roofing substrates, offering versatility for retrofit projects and new installations alike.
Application Guidelines
Proper surface preparation is essential for optimal adhesion and performance. Clean the roof surface to remove dirt, dust, oils, and other contaminants. For gravel or BUR surfaces, remove loose material and repair obvious damage before coating. If substrates are damp, allow them to dry completely before application.
Primer and Primer Alternatives: Some substrates may require a primer to improve adhesion, especially on concrete or porous surfaces. Follow manufacturer recommendations for primer use and cure times.
Application Methods: Apply Elasto-Kool 700 with rollers, brushes, or airless spray systems, depending on project size and accessibility. Apply in a uniform coat with even thickness, avoiding ponding. Typical coverage rates range from X to Y square feet per gallon, depending on surface porosity and desired coat thickness. Always consult the product data sheet for exact coverage guidelines.
Drying and Curing: Allow the coating to dry to a tack-free state before applying a second coat if required. Dry and cure times are influenced by temperature, humidity, and air flow.
Safety Considerations: Use protective gloves and eye protection. Ensure adequate ventilation during application, especially for enclosed roof spaces. Dispose of water and tools according to local regulations.
Performance, Durability, and Longevity
In field testing and independent performance data, Elasto-Kool 700 demonstrates strong adhesion to a range of substrates and sustained elasticity over time. The elastomeric film remains flexible in hot and cold conditions, helping minimize cracking under thermal expansion. Reflectivity remains a core performance facet, contributing to lower roof surface temperatures and potential energy savings.
Actual longevity depends on roof preparation, climate, maintenance, and the application’s film thickness. A well-prepared substrate with proper film thickness can extend roof life by preventing moisture intrusion and reducing the need for frequent patching.
Substrate Compatibility and Surfaces
The White Elasto-Kool 700 is designed for a variety of common roofing assemblies, including:
- Built-Up Roofing (BUR)
- Modified Bitumen
- Single-Ply Membranes
- Concrete Roof Decks
- Plywood and OSB with appropriate sealing
Prior to application, verify substrate integrity, repair all large blisters or damage, and ensure the surface is dry, clean, and sound. On highly porous substrates, a primer may be beneficial to enhance adhesion.
Maintenance and Repair Considerations
Regular inspection after severe weather or seasonal transitions helps identify early signs of wear, such as micro-cracks, chalking, or areas of reduced reflectivity. When necessary, spot-recoat or re-treat distressed zones to preserve waterproofing and U-value benefits. Cleaning the coating should be minimal; avoid aggressive cleaners that could degrade the elastomeric film. If re-coating is planned, ensure the existing coating is structurally sound and compatible with the new layer.
Environmental and Safety Considerations
Elasto-Kool 700 is water-based, which generally lowers VOC content compared with solvent-based elastomeric coatings. However, local environmental regulations may apply to its use and disposal. When applying, follow label instructions, protect nearby vegetation and surfaces, and ensure proper disposal of containers and excess material. Safety data sheets provide detailed hazard information and first-aid measures for handling and application.
Comparisons and Alternatives
For projects selecting a white elastomeric roof coating, compare Elasto-Kool 700 with other high-build white elastomerics and reflective coatings. Consider factors such as:
- Elasticity and cure time
- Reflectivity and emissivity values
- Substrate compatibility and required primers
- Recommended film thickness and coverage rates
- VOC content and environmental certifications
Choosing the right coating involves balancing performance with project constraints like budget, climate, and roof condition. Reading the product data sheet and conducting a small field test area before full-scale application can help ensure compatibility and expected performance.