ConSandtrate Concrete Crack Filler 3 lb, 5 Colors, Self-Healing

Why It Beats a Tube of Filler or a Bag of Cement

• Nothing to mix or measure. Polyurethane tubes clog, caulk smears, and a cement patch has to be measured, mixed and troweled before it goes off. This pours in dry like sand.
• It heals itself. The maker describes the hardened infill as self healing and weather resistant.
• It seals water out. Water getting into a crack and freezing is the reason cracks spread. Closing the crack against water is what stops it growing.
• It looks like concrete. Cures to a sandy, grout-like texture in five colors rather than a glossy bead of caulk sitting proud of the surface.
• Sizes that match the job. One bottle for a couple of cracks, three for a whole driveway.

Coverage by Pack Size

Coverage assumes a hairline to medium crack filled to the surface. A deep or wide crack will take more, which is what the pea gravel backfill below is for.

How to Apply It

1. Clean the crack out. Get the loose debris, old filler and any dirt out of it.
2. Let it dry completely. This is the step people skip, and a damp crack is what activates the polymer before you want it to.
3. Pour ConSandtrate straight into the crack, filling to the surface.
4. Mist lightly with a spray bottle. Mist, do not flood.
5. Let the polymers activate and set.
6. If the filler settles into a deeper crack, top it up and mist again.
7. Keep the area dry while it cures.

Getting It Right

• For a crack over 1 inch wide, backfill with pea gravel or similar aggregate first, as the maker directs. It fills the space you do not need to pay to fill and stops the product disappearing down the crack.
• Work in dry, mild weather. Rain in the forecast is a reason to wait.
• Keep the bottle sealed between uses, because moisture will activate whatever is left in it.
• Match the color to your slab before you pour, not after. Cured filler is not coming back out.
• Sweep and rinse the slab first. A concrete and paver cleaner clears the dirt, oil and efflorescence so the polymer can bond.
• Once the repair has cured, a paver and concrete sealer protects the rest of the slab from the water and freeze-thaw that caused the crack.

Where It Works, and Where It Does Not

Works on: concrete driveways, sidewalks, walkways, patios, pool decks, steps, back porches and outdoor stairs, across stamped, broom finished, smooth, aggregate and decorative concrete.

Use something else for: joints between pavers, where you want polymeric sand instead. Wide expansion joints and control joints, where a flexible self leveling sealant is the right tool. Large voids or a worn out slab, where a cementitious patch or resurfacer does the job.

ConSandtrate Specifications