Black Jack Roof Cement Review: An All-Weather Patching Compound

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roof overview

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Concrete cracks are found on commercial and residential buildings. Some cracks interfere with the structural integrity of the building, and you must consult experts for a major repair. Other cracks look bad, but won’t harm the building. Use roof cement from commercial manufacturers if your roof has minor problems. 

This Black Jack roof cement review offers information on the technical and safety aspects of this brand of roof cement, along with instructions on how to use it, pricing, storage, and other factors. You’ll be better equipped to make a wise buying decision if you know a lot about a product. 

What Is The Product?

Black Jack Roof Cement is used to patch cracks in residential and commercial buildings. This cement mixture must be used with a trowel to fill cracks or repair light damage on rooftops. This cement dries in 240 minutes, according to information provided by the manufacturer. 

Black Jack Patching Cement comes in a five-gallon can. The content of one can cover 57 square feet. The contents are durable for at least a year. This roof cement has a glossy sheen and isn't water-based. 

Use All-Weather roof cement from Black Jack on dry and damp surfaces. This pliable asphalt cement will protect your roof. You can stop leaks around valleys, skylights, gutters, spouts, vent pipes and chimneys on your roof. Seal splits or cracks temporarily with Black Jack.  

Avoid using Black Jack on EPDM roofing systems or rubber membranes. You can seal cracks that let water through walls, foundation joints, or exterior chimneys. You can also line leaking gutters or troughs with this cement.  

Black Jack roof cement seals roof projections including flashings. This cement is trowel grade, thick and fiber reinforced to last longer. Use Black Jack on dry or wet roofs.

Use Black Jack to waterproof or dampproof your roof. Don’t paint over Black Jack roof repair, and use reinforcing fabric over large repairs.  Black Jack roofing cement is manufactured in the United States. 

 Black Jack is available in a ten-ounce tube for quick roofing repairs. Use with a trowel, not a brush.

This all-weather roofing cement comes with a limited three-year warranty. 

Preparation

roof with dirts

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Clean and dust roof surfaces of debris, rust, and loose material. Apply the cement when temperatures are between 50 degrees and 120 degrees. Store the paste in a hot (70 to 80-degree room) at least a full day before application if you need to use it in cool (under 50 degrees) weather.  You can use Black Jack Roof Cement year round.  

Application

Apply the mixture with a putty knife or trowel. Reinforce the affected area with a patching fabric strip. Work the mixture until it’s consistent and apply it to the repair area in amounts that are one-eighth to one-half inch thick, and extend the patch two to three inches beyond the damaged area. 

Press the reinforcement fabric into the cement, and cover it with another layer of cement. Make a feathered edge with the cement in areas where vent pipes, chimneys or other projections align with the roof line.  

Product Specifications

Black Jack can be used on drip edges, roof material edges, setting flashings, and other new construction. Apply the cement over the surface and use a trowel to jam it into cracks.

The cement stiffens and cures after application to achieve a weatherproof coat. One can cover a large area of your roof, so remember to seal the can after every use to keep the contents ready for later use.  

One can of this cement weighs 27 pounds. Most online customer reviews were positive. Consumers say that the product has excellent consistency for trowelling, and you can use it out of the can. A few people wrote that they had to warm the cement for half an hour in hot water before applying it to their roofs. 

The mixture won’t run when applied to cracks or problem areas for repair.

Remember!

The technical information phone number is 813-248-2101, and customer service is open from 8 AM to 5 PM M-F Eastern Standard Time at the same number. The U.S. emergency information phone is 800-424-9300, and the international CHEMTREC emergency number is 703-527-3887.

Safety

According to the official safety data sheet for All-Weather Roof Cement, the product is a black paste mixture to repair seams, holes, and cracks in rooftop materials. The mixture is manufactured in Tampa, Florida by Gardner-Gibson.

The roofing cement should be kept away from children. Don't smoke near this product, and keep it away from open flames and sparks. Use all-weather roof cement with adequate ventilation, and avoid prolonged breathing of vapors. Breathing the vapors for too long may result in respiratory damage and brain or nervous system damage.  

Use masks, eye covering, and gloves when using this product to avoid complications. Remove contact lenses when using this product, if possible. Wear eyeglasses to prevent fumes from interfering with your eyesight. 

Rinse with water if the paste gets on our skin or in your eyes. Call a poison control center or go to the emergency room if the irritation persists.  Swallowing this mixture can be fatal.    

Seal the product tightly and store in a well-ventilated area.  Handle spilled paste or open/damaged containers while wearing protective clothing. Remain upwind of the cement and make sure the area is well-ventilated before handling the product.    

Eliminate any ignition sources, including flare, sparks, flares, and don’t smoke in the vicinity of the emergency. Isolate the affected area and contain the material. Anyone who isn’t wearing protective gear should leave the area.  

Avoid letting Black Jack roofing cement enter sewers, basements, waterways, or any confined area. Absorb or contain any spills with sand or other inert material, and then place in a suitable container. Don't flush spilled material with water, and avoid using oxidizing agents around the roof cement.    

Coverage Calculation

You can use an online coverage calculator to figure out how much Black Jack roof cement to use for a particular project. Determine square footage by multiplying the width of an area by the length of that area. 

Break down non-rectangular areas into small rectangles. You can break down an L-shaped space into two small rectangles and then add the footage of the two areas for the overall space. 

Subtract the footage of areas where you won’t apply the mixture from the total area. 

Related Products From Black Jack 

Black Jack makes several other roof patching and repair products. Some of these products come in sized cartridge canister, while others come in gallon cans. The extensive line of roofing repair items make Gardner Gibson a "one-stop shop" for roofing repair needs; in the event, All-Weather Cement Roof Cement doesn't fulfill all your needs.

The manufacturer also makes 10-Ounce Wet Patch Roof Cement Cartridge that repairs wet surfaces. Use this cartridge for a tight waterproof seal on dry or damp surfaces. This wet patch compound remains pliable and soft long after initial application. 

Most customer reviews are positive or mixed, but there are a few bad reviews. This roof cement is excellent for small repairs, one reviewer writes. The cartridge gets the job done, another reviewer comments. One negative review mentions you can get a similar product cheaper from another company.

  • Rinse with water if the paste gets on our skin or in your eyes. Call a poison control center or go to the emergency room if the irritation persists.  Swallowing this mixture can be fatal.   
  • Seal the product tightly and store in a well-ventilated area.  Handle spilled paste or open/damaged containers while wearing protective clothing. Remain upwind of the cement and make sure the area is well-ventilated before handling the product.    
  • Eliminate any ignition sources, including flare, sparks, flares, and don’t smoke in the vicinity of the emergency. Isolate the affected area and contain the material. Anyone who isn’t wearing protective gear should leave the area.  
  • Avoid letting Black Jack roofing cement enter sewers, basements, waterways, or any confined area. Absorb or contain any spills with sand or other inert material, and then place in a suitable container. Don't flush spilled material with water, and avoid using oxidizing agents around the roof cement.      

Coverage Calculation

You can use an online coverage calculator to figure out how much Black Jack roof cement to use for a particular project. Determine square footage by multiplying the width of an area by the length of that area. 

Break down non-rectangular areas into small rectangles. You can break down an L-shaped space into two small rectangles and then add the footage of the two areas for the overall space. 

Subtract the footage of areas where you won’t apply the mixture from the total area. 

Related Products From Black Jack 

Black Jack makes several other roof patching and repair products. Some of these products come in sized cartridge canister, while others come in gallon cans. The extensive line of roofing repair items make Gardner Gibson a "one-stop shop" for roofing repair needs; in the event, All-Weather Cement Roof Cement doesn't fulfill all your needs.

The manufacturer also makes 10-Ounce Wet Patch Roof Cement Cartridge that repairs wet surfaces. Use this cartridge for a tight waterproof seal on dry or damp surfaces. This wet patch compound remains pliable and soft long after initial application. 

Most customer reviews are positive or mixed, but there are a few bad reviews. This roof cement is excellent for small repairs, one reviewer writes. The cartridge gets the job done, another reviewer comments. One negative review mentions you can get a similar product cheaper from another company.

Gardner Gibson’s Black Jack 6190 5 Gallon Foundation seals, resurfaces and waterproofs roofs. The product comes in a 4.75-gallon can, and it’s non-fibered and solvent-free. Emulsion Roof Coating is made in the U.S.A., and you can use it to protect or seal metal surfaces or wood footings.

Use  Black Jack 6190 5 Gallon Foundation to seal and dry in black. You can clean up spills with water. This odorless mixture makes worn surfaces look new. This product is thick and rolls easily, one reviewer writes, but another user comments that it works better as a waterproofing paint than a roof application 

Reflect the sun's rays into the sky with white roof coatings. These coatings reduce the temperature on your roof and in your home. The coatings offer a high amount of thermal emittance to make your home more energy efficient.

Elasto-Kool 1000 White Siliconized Elastomeric Coating from Black Jack is a flexible white acrylic coating for rooftops. The water-resistant coating contains silicone to boost adhesion and increase durability. 

Elasto-Cool coating cools rooftops and won't crack or peel. This white coating expands and contacts with the movements of the roof to prevent damage. This coating helps guard against harmful UV rays that can damage your roof and increase the interior temperature of your home.   

White anti-heat coating expands and flexes up to 350 percent to reduce your air conditioning costs. This mixture is best for built-up (BUR) roofing, tile, or metal roofs. You can cover up to 50 to 75 square gallons per coat.  

Pricing

A pack of 12 one quart cans cost around $ on Amazon.com. A 4.75-gallon costs around $ on Lowe's.com, and around $ on Amazon.com.  

How It Compares

This Black Jack roof cement review wouldn't be complete without a look at a few of the competing roof repair products. Here are comparisons of Black Jack and two other roof cement brands.

Henry Roof Cement 

Price - $​
Ease of Use:  4 out of 5 stars
Ingredients: 3 out of 5 stars
Quality: 3 out of 5 stars
Customer Service: 2 out of 5 stars

A bit stiff to spread out on damaged areas, one user writes, but it covers a lot of space. Another reviewer used cotton work gloves, and the mixture didn't soak through the material. This cement works on a metal roof, even when it rains, writes another user. 

Another user liked the product’s durability and praised it for keeping melting ice and snow from leaking into the house. You may have trouble keeping the mixture in the proper areas when spreading it, according to another reviewer. This product boasts mostly four and five-star reviews

This mixture is manufactured in China and is available in one gallon and 0.9-gallon sizes.  

Sashco Roof Sealant 

Price - $
Ease of Use: 4 out of 5 stars  
Ingredients:  4 out of 5 stars 
Quality: 4 out of 5 stars 
Customer Service: 3 out of 5 stars  

Online reviewers like this clear cement patch mixture, and have used it to patch up roofs in hurricane territory with excellent results. This product also works well in hot climates, like Arizona, according to the reviews. The mixture can smooth out on its own in cold weather. This product is made in China.

Black Jack All Weather Roof Cement 

Price - $​
Ease of Use: 4 out of 5 stars   
Ingredients: 4 out of 5 stars 
Quality: 5 out of 5 stars 
Customer Service:  4 out of 5 stars

Black Jack is one of the most trusted names in the roof repair field and their all-weather roof cement. You can use this anytime, in wet or dry conditions, and apply it to flashings or any protrusions on your roof. An ex-professional roofer called All-Weather Roof Cement a middle of the road product, not the best, but not the worst.  

Most of the user reviews on the Lowe's website give Black Jack five stars. There's only a single one-star rating without a review attached.  

Pros And Cons

What are the advantages and disadvantages of Black Jack roof cement? Here’s a look at what to expect from this patching compound by Gardner Gibson.  

​Cons

  • The mixture won't run or become messy during application
  • Cures after application for a glossy, waterproof coat 
  • Made in the U.S.A.
  • Available in several sizes
  • You can buy this product online, or from Lowe’s, Ace Hardware, or other hardware and home improvement stores.
  • Good price

​Cons

  • Too sticky
  • A temporary fix to roof problems







Conclusion

We gathered all the information we could find online for this Black Jack roof cement review, including safety and warranty details. We looked at customer reviews from across the internet as well as information from the manufacturer’s website. 

Black Jack roof cement is the industry-leading roof repair mixture, and many customers have used it for years or even decades. We recommend Black Jack roof cement and related products for quick, temporary roof patching and repairs.

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