Crack filler calculator
Pounds of hot pour crack sealant and how many blocks to bring, from the footage and the size of the cracks.
Overband is taken as an eighth of an inch thick. Starting rates, not a spec: the sealant's data sheet gives its weight per gallon.
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How much crack filler do I need per foot? Work out the crack's volume: width times depth in inches, times 12, gives cubic inches per foot. Divide by 231 for gallons and multiply by the sealant's weight per gallon (hot pour is often about 9.7 pounds). A half inch by half inch crack takes about 0.13 pounds per foot.
Common questions
Work out the crack's volume: width times depth in inches, times 12, gives cubic inches per foot. Divide by 231 for gallons and multiply by the sealant's weight per gallon (hot pour is often about 9.7 pounds). A half inch by half inch crack takes about 0.13 pounds per foot.
It depends almost entirely on the crack size. Allowing 10 percent for melter waste, a 30 pound block of a 9.7 pound per gallon sealant fills roughly 860 feet of quarter inch cracks, about 215 feet of half inch cracks, and under 100 feet of three quarter inch cracks.
A thin band of sealant spread over the top of the crack, a few inches wide, so the edges are sealed too. It looks neater and seals better on some cracks, but it adds material: a 3 inch overband an eighth of an inch thick is about 4.5 cubic inches a foot, more than the half inch square crack under it.
As a rule of thumb, cracks from about a quarter inch to an inch wide are filled. Hairline cracks are usually left for the sealcoat, and wide cracks, potholes and alligatored areas where the base has failed need a patch instead.
TrackOver keeps the estimate, the materials, the crew schedule and the job photos in one place, from the first quote to the final invoice.