09/22/2026
Cracks filled this month have to survive a Canadian winter.
Most failed crack filling jobs have these in common:
Sealing over dirty cracks: Filler bonds to clean sidewalls, not to dirt. Crack sealer over a crack full of debris and vegetation is a band-aid on Vaseline. Blow it out, clean a half-inch deep, and let your filler do its job.
Filling cracks that are too wide: Hot pour crack sealer is for cracks up to a half inch. Wider than that and the filler just settles inside the crack, leaving a gap for water. Use a top patch material or mastic for anything wider. If you do have to use hot pour, plan on multiple passes to bring it up to the surface.
Overheating the material: Pushing your melter past the manufacturer's recommended temperature breaks down the rubberized binders in the sealer. It looks fine going in, but it gets brittle fast and cracks again within a season. Watch your temps and keep the material in the working range.
Filling wet or cold cracks: Moisture stops the filler from bonding, and fall mornings leave dew in the crack long after the surface looks dry. A heat lance clears debris, dries the crack, and warms the sidewalls in one pass. Pour right after, since cracks pick up moisture again fast.
Clean it, size it right, and keep it in the right temperature range. That's the difference between crack fill that lasts and a callback you don't get paid for.
