How Much Should I Buy?

Coverage is provided as a range to accommodate variations in surface porosity. On the roof, smoother surfaces like metal will achieve better coverage rates and require less product. The same applies on the ground. Driveways that are in better condition will absorb less.

Black Jack Rubr-Seal, 2.75 Gallon, Rubberized Roof & Flashing Cement, Stops Leaks Fast, Best For Extreme Weather Conditions, Longest Lasting Rubberized Seal, Ideal On Flat Or Vertical Surfaces, Best Stick In Wet Or Dry Conditions, Highly Flexible Product Can Be Used Year Round In Any Weather Condition To Stop & Seal Leaks, Formulated To Repair. Black Jack® 6148-9-27 Rubr-Seal Rubberized Roof & Flashing Cemen, 2.75 Gallon. SKU: 10742851 Created with Sketch. Full Name. Email. Phone.

Select a Product

Enter the number of feet (square feet or linear feet) to be covered:

Pack Size

# for 1 coat

# for 2 coats

Product Code

Where to Buy

How do I calculate square footage?
Square footage is based on multiplying the length of an area x width of that area.
What about non-rectangular areas?
In those instances, you need to break the area down into smaller rectangles. For instance, an L-shaped surface can be broken into 2 smaller rectangles (see illustration below). Add the 2 areas (100 + 200 = 300 sq ft) to get a total.

Black Jack Rubr Seal Reviews

For areas where you will not apply product, subtract that area from the total.

Black Jack Rubr-seal