ConSandtrate Concrete Crack Filler is a dry, granular polymer filler for cracks in concrete. You pour it straight into the crack, mist it with water, and it sets into a hardened infill that the maker describes as self healing and weather resistant. There is no mixing, no caulk gun and no cement to measure. It is aimed at homeowners and contractors fixing hairline cracks and cracks up to 2 in wide in driveways, sidewalks, patios, steps and pool decks.
This guide covers what the filler is, the crack sizes and surfaces it is meant for, the application steps in the order conSANDtrate gives them, how many bottles a job takes, and the questions we hear most. Every figure below comes from the conSANDtrate product page and listing for the 3 lb bottle.
Quick answer
- ConSandtrate is a dry granular, water activated polymer crack filler sold in 3 lb bottles, in Gray, Tan, Brown, White and Black, as 1, 2 or 3 bottle packs.
- It is made for hairline cracks and cracks up to 2 in wide. For cracks wider than 1 in, backfill with pea gravel or a similar aggregate first.
- Coverage per the product page: 12 to 15 linear ft for 1 pack, 25 to 30 linear ft for 2 packs, 36 to 45 linear ft for 3 packs.
- Dry to the touch and able to handle traffic after about 1 hour; full cure takes 48 hours.
What ConSandtrate Concrete Crack Filler is
ConSandtrate Concrete Crack Filler pours in dry like sand and is activated by a light mist of water. Here are its headline traits as the product page describes them:
| Trait | What the product page says |
|---|---|
| Form | Dry granular polymer, activated with water |
| Mixing | None. Pour dry, then mist |
| Cured seal | Self healing, weather resistant hardened infill |
| Water | Seals water out of the crack |
| Look | Cures to a sandy, grout like texture rather than a glossy bead |
| Colors | Gray, Tan, Brown, White, Black |
The reasoning behind sealing the crack is laid out on the product page. Water that gets into a crack and freezes is what makes cracks spread, so closing the crack against water is what stops it growing.
ConSandtrate specifications
| Specification | Per the product page |
|---|---|
| Bottle size | 3 lb |
| Colors | Gray, Tan, Brown, White, Black |
| Pack sizes | 1, 2 and 3 bottle packs |
| Type | Dry granular, water activated polymer |
| Mixing | None, pour dry and mist |
| Cured texture | Sandy, grout like |
| Crack size | Hairline cracks and cracks up to 2 in wide. Backfill cracks wider than 1 in with pea gravel or similar aggregate first |
| Set and cure | Hardens within minutes of the water hitting it, dry to the touch in about 1 hour, fully cured in 48 hours |
| Foot traffic | After about 1 hour |
| Vehicular traffic | The maker gives about 1 hour for traffic and 48 hours for full cure |
| Surfaces | Stamped, broom finished, smooth, aggregate and decorative concrete |
The product page does not list an application temperature range, shelf life or technical data sheet. The guidance given is to work in dry, mild weather, and the listing notes to always follow the conSANDtrate data sheet and to test a small area first.
Where to use it (and where not to)
ConSandtrate is listed for concrete driveways, sidewalks, walkways, patios, pool decks, steps, back porches and outdoor stairs. It works across stamped, broom finished, smooth, aggregate and decorative concrete. The product page says it is a common choice for small cracks around pool decks because the cured polymer is water resistant.
The product page is just as clear about where to use something else:
- Joints between pavers. Use polymeric sand instead. Our guide on how to fix cracked paver joints walks through that repair.
- Wide expansion joints and control joints. A flexible self levelling sealant is the right tool there.
- Large voids or a worn out slab. A cementitious patch or resurfacer does that job. Browse concrete repair and mixes for those.
Weather matters too. Work in dry, mild weather, and treat rain in the forecast as a reason to wait. Moisture is what activates the polymer, so a wet crack or a shower before it cures works against you.
How to use ConSandtrate Concrete Crack Filler
These are the steps from the product page, in order. Always follow the conSANDtrate data sheet, and test a small area first.
- Clean the crack out. Get the loose debris, old filler and any dirt out of it. The product page also suggests sweeping and rinsing the slab first, and says a concrete and paver cleaner clears the dirt, oil and efflorescence so the polymer can bond.
- Let it dry completely. This is the step people skip. A damp crack activates the polymer before you want it to.
- Pour. Pour ConSandtrate straight into the crack, filling to the surface.
- Mist lightly. Use a spray bottle. Mist, do not flood.
- Let it activate and set. The polymers harden within minutes of the water hitting them.
- Top up if it settles. If the filler settles into a deeper crack, top it up and mist again.
- Keep it dry while it cures. Full cure takes 48 hours.
For a crack wider than 1 in, the maker says to backfill with pea gravel or a similar aggregate before you pour. It fills space you do not need to fill with product and stops the filler disappearing down the crack. Pick the color before you pour, not after. Hold the color against your slab in daylight, because cured filler does not come back out.
How much ConSandtrate you need
The product page gives coverage in linear feet by pack size:
| Pack | Coverage | Best for |
|---|---|---|
| 1 pack | 12 to 15 linear ft | One or two cracks on a walkway or patio |
| 2 pack | 25 to 30 linear ft | A driveway apron or a full sidewalk run |
| 3 pack | 36 to 45 linear ft | A whole driveway or pool deck |
That coverage assumes a narrow crack filled to the surface. A deep or wide crack will take more, which is why the maker recommends backfilling cracks wider than 1 in with pea gravel or similar aggregate. To estimate, walk the cracks with a tape measure, add up the linear feet, and pick the pack that covers it with a little to spare for topping up.
Safety and storage
The main storage point on the product page is to keep the bottle sealed between uses, because moisture will activate whatever is left in it. For protective equipment and anything else not covered here, follow the label directions.
After the repair
Once the repair has cured, the product page suggests a paver and concrete sealer to protect the rest of the slab from the water and freeze thaw that caused the crack in the first place. If you go that route, our step by step sealing guide covers prep and application.
Frequently asked questions
How do you fix a crack in a concrete driveway with ConSandtrate?
Clean the crack out, let it dry completely, pour the filler in to the surface, mist it with water and let it cure. There is no mixing, no caulk gun and no trowel.
Will it stop the crack spreading?
The product page says it seals water out, and water freezing inside a crack is the main reason cracks grow. The maker also describes it as self healing and weather resistant.
How long before I can walk or drive on it?
It hardens within minutes of misting and, per the maker, is dry to the touch and able to handle traffic after about 1 hour. Full cure takes 48 hours.
What crack sizes does it handle?
Hairline cracks and cracks up to 2 in wide. For cracks wider than 1 in, backfill with pea gravel or a similar aggregate first so you are not filling dead space. Wide expansion and control joints call for a flexible self levelling sealant instead.
Can I use it between pavers?
No. The product page says to use polymeric sand for joints between pavers. ConSandtrate is for cracks in concrete.
Have a few cracks to close up before winter? Order ConSandtrate Concrete Crack Filler in the color that matches your slab, or browse our concrete repair and mixes. It ships same day from our New Jersey warehouse. Call us 24/7 at (856) 418-4895 with sizing or color questions.