Latex-ite 30' PLI-STIX permanent asphalt and concrete crack filler is the only permanent solution to cracks in the marketplace. It is the same product seen on highways and roads; the only difference is you can apply it and do not need a 200 gallon melter to do it. PLI-STIX is permanent because it is applied with heat (a simple hand-held torch) and it bonds to the sidewalls of the crack. Cracks open up because they expand and contract with freeze/thaw cycles - but PLI-STIX will expand and contract right along with mother nature. Fills cracks up to 1/2". Low VOC's.