Black Jack manufactures roofing cements, waterproofing coatings, and foundation sealers that contractors have relied on since 1913. The company claims to have made the world’s first roof cement, and their current product line focuses on asphalt-based solutions for both commercial and residential applications.
Core Product Lines and Performance Specifications
Black Jack’s flagship roof cements deliver consistent coverage rates of 12 square feet per gallon at 1/8-inch thickness, giving contractors predictable material calculations for job estimates. The all-weather formulation works in application temperatures from 50°F to 120°F — crucial for Montana’s variable climate where morning temps might be 40°F and afternoon hits 90°F.
The products break down into seven main categories:
| Product Category | Primary Applications |
|---|---|
| Asphalt Roof Repair & New Construction | Roofing coatings and repair products |
| Cool Roof Coatings & Repairs | Reflective and cooling roof coating solutions |
| Below Grade Dampproofing | Foundation and below-grade waterproofing |
| Blacktop Driveway | Asphalt driveway sealers and coatings |
| Caulks & Sealants | Sealing and waterproofing products |
| Road Products | Road and pavement coating products |
| Waterproofing Products | General waterproofing applications |
The 1-gallon All-Weather Roof Cement shows a flash point of 105°F and VOC content under 200 g/L, meeting current air quality standards while maintaining solvent-based performance. With approximately 42% solids by weight after evaporation, you’re getting actual sealing material, not just carrier solvents that evaporate away.
Technical Specifications That Matter
Here’s what contractors need to know about Black Jack’s workhorse products:
All-Weather Roof Cement Specifications:
| Specification | Value | Source |
|---|---|---|
| Coverage | 12 sq ft/gallon at 1/8” thickness | Manufacturer |
| Application Temperature | 50°F to 120°F | Manufacturer |
| Flash Point | 105°F | Manufacturer |
| VOC Content | < 200-250 g/L | Manufacturer |
| Solids by Weight | ~42% | Manufacturer |
| Cure Time | 30-60 days before coating | Manufacturer |
| Weight (5-gallon) | 44-48 lbs | Manufacturer |
| Consistency | Thick trowel grade | Manufacturer |
The fiber-reinforced formula provides crack bridging capability while maintaining a thick trowel-grade consistency that won’t slump on vertical surfaces. The product remains soft and pliable after application — it won’t become brittle and crack during temperature swings.
Fibered Roof & Foundation Coating Specifications:
| Specification | Value | Source |
|---|---|---|
| Coverage | 50 sq ft per 4.75 gallon | Manufacturer |
| Application Temperature | 50°F to 120°F | Manufacturer |
| Storage Temperature | 70°F-80°F for 24h before cold use | Manufacturer |
| Weight (5-gallon) | 44 lbs | Manufacturer |
| Base | Solvent-based with fiber reinforcement | Manufacturer |
The storage temperature requirement matters in Montana. Store at 70°F-80°F for 24 hours before cold-weather application — keep a bucket in the heated shop before heading to the jobsite on those 30°F mornings.
All-Weather Application Capabilities
Black Jack’s all-weather formula applies to wet, damp, or dry surfaces — a real advantage when you can’t wait for perfect conditions. Miami-Dade County Approval means it’s tested for extreme weather conditions, though that’s hurricane territory, not Montana blizzards.
Primary applications include roof leak repair around vent pipes, spouts, valleys, and skylights; sealing gutters, chimneys, and roof projections; construction and repair of flashings; below-grade waterproofing; and repairing exterior wall and foundation cracks.
The fibered coating serves dual purposes. It renovates worn roof surfaces while also functioning as foundation dampproofing for exterior masonry walls. Suitable surfaces include asphalt roofs, metal roofs and shingles, masonry and concrete foundation walls, wood footings underground, and mobile home roofs.
Professional contractors appreciate the weatherproof properties that protect against heavy rain and temperature fluctuations, with the fiber reinforcement allowing for larger repair areas when combined with fabric. The main limitation contractors note is that these products cannot be painted over — factor that into your finish plans.
The Bottom Line
Black Jack delivers predictable coverage rates, specific temperature ranges, and all-weather application capability that Montana contractors need. The 12 square feet per gallon coverage at 1/8-inch thickness takes the guesswork out of material ordering. The 50°F to 120°F application range covers most of the construction season. The ability to apply on damp surfaces means workdays aren’t lost waiting for perfect conditions.
Manufacturing roofing and waterproofing products since 1913, Black Jack positions itself as “The Professional’s Choice” — and the performance specs back that up. Users report no leaks after heavy rains and improved crack filling, suggesting the products perform as specified in real-world conditions.
Montana contractors dealing with freeze-thaw cycles, spring melt, and summer heat find these products offer measurable performance characteristics that matter more than marketing claims. The 30-60 day cure time before coating means planning ahead during the short construction season, but the all-weather application capability helps make up for that limitation.
FAQ
Q: Can Black Jack roof cement be applied in cold weather? A: The products work in temperatures from 50°F to 120°F. Below 50°F, the material becomes too stiff to apply properly. For cold-weather work, store the bucket at 70°F-80°F for 24 hours before application to improve workability.
Q: What’s the actual coverage from these products? A: All-Weather Roof Cement covers 12 square feet per gallon at 1/8-inch thickness. The Fibered Roof & Foundation Coating provides 50 square feet coverage per 4.75 gallon container. Thicker application reduces coverage proportionally.
Q: Can Black Jack products be painted over? A: No, these products cannot be painted over. Plan your finish appearance accordingly, as the black coating will remain visible.
Q: Do these products work on wet surfaces? A: Yes, the all-weather formula can be applied to wet, damp, or dry surfaces. This flexibility makes emergency repairs possible without waiting for surfaces to dry completely.
Q: What surfaces work with Black Jack products? A: Suitable surfaces include asphalt roofs (flat or low-slope), metal roofs and metal shingles, masonry and concrete foundation walls, wood footings underground, and mobile home roofs. Not recommended for rubber membranes or EPDM roofing.
Q: How long before a coating can be applied over Black Jack roof cement? A: Allow 30 to 60 days cure time before applying reflective coatings. This extended cure time requires planning during Montana’s construction season.
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