Contractor Guide: Fast, Permanent Repairs for Real‑World Concrete Problems

Roadware 10 Minute Concrete Mender™ is a thin, two-part structural polyurethane that behaves almost like water.

It runs deep into cracks, locks into the concrete, and cures in about 10 minutes — even in cold environments.

If you need a repair that won’t pop out, smear, or crack under forklifts, this is the material. Concrete Mender, contractor guide

What Makes Concrete Mender™ Different

It Goes Deep

Concrete Mender™ has extremely low viscosity (8–9 cps). It wicks into tight cracks and micro‑fractures that epoxies can’t reach. Instead of sitting on top, it bonds inside the concrete and restores strength from the bottom up.

It Cures Fast

At 70°F, you’re looking at roughly 10 minutes to a traffic‑ready repair. Perfect for warehouses, retail floors, distribution centers, and anywhere downtime costs money.

It does not become brittle.

Unlike epoxy, Concrete Mender™ doesn’t get brittle. It deforms with the slab, handles vibration, and won’t chip out under heavy equipment or polishing machines.

It Works in Freezers

Concrete Mender™ cures reliably down to ‑20°F (‑28°C). No heaters, no waiting.

When to Use It

• Crack repair — shrinkage cracks, stress cracks, full‑depth cracks
• Spalls and pop‑outs — forklift damage, joint blowouts, delamination
• Cold storage — freezer floors, loading docks
• High‑traffic slabs — warehouses, retail, airports
• Polished concrete prep — fills cracks without smearing or ghosting

How to Use It (Contractor Workflow)

1. Prep the Area

• Clean out loose debris
• Vacuum dust
• Make sure the concrete is dry
• For cracks: chase with a blade if needed to open the top

2. Choose Your Method

• Cartridge — best for cracks and small spalls
• Needle‑tip mixers — for tight cracks and precision work
• Bulk mix — for larger spalls or wide cracks
• Sand‑extended mix — add silica sand to build volume and match thermal movement

3. Apply the Material

• Let Concrete Mender™ flow into the crack — don’t force it
• Add more until the crack stays full
• For spalls: mix with sand to a stiff, wet consistency and trowel in

4. Finish the Repair

• Shave flush after cure (about 10 minutes at 70°F)
• Grind or polish as needed
• Ready for coatings almost immediately

Tips from the Field

• Don’t overfill — the material is thin and will sink as it penetrates
• Always have sand ready — extending the mix saves material and improves performance
• Use needle tips for tight cracks — they push material deep without mess
• Warm the cartridges in cold weather — improves flow
• Vacuum thoroughly — dust blocks penetration
• Product Calculator — use the online product estimator calculator

Limitations You Should Know

• Concrete must be dry
• Slabs should be at least 60 days cured
• Material may yellow in sunlight
• Outdoor cracks should have minimal movement

Why Contractors Choose It

Concrete Mender™ is trusted by major industrial and retail operators because it’s fast, strong, and predictable. It doesn’t fail under forklifts, pallet jacks, or polishing equipment — and it keeps operations running with almost no downtime.

CRACK REPAIR

1. Clean out with diamond grinder and remove dirt and dust.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid to grade.
4. Strike off excess material and allow to cure for 10 minutes at 70°F.
5. Open to traffic. Finish and blend with a grinding stone if desired.

SPALL REPAIR

1. Clean out with a diamond grinder and remove dirt and dust.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine-graded silica sand and additional liquid. Work in one-inch lifts to grade.
4. Strike off excess material and allow to cure for 10 minutes at 70°F.
5. Open to traffic. Finish and blend with a grinding stone if desired.

HAIRLINE CRACKS

1. Score the top of the crack with a diamond blade or wire brush.
2. Remove dust with a vacuum.
3. Flood with Roadware 10 Minute Concrete Mender™ supplied in twin cartridges and optional needle tip mixer. Or, use the Roadware Easy Injection System.
4. Add a fine-graded silica sand to larger areas and allow to soak in.
5. Strike off excess material and allow to
6. cure for 10 minutes at 70° F.
7. Open to traffic. Finish and blend with a grinding stone if desired.

SPALLED CONTROL JOINT

1. (Fully cured non-moving)
2. Clean out with diamond grinder and remove dirt and dust. Score back spall with blade for a finished look.
3. Flood with Roadware 10 Minute Concrete Mender™
4. Add a fine graded silica sand and additional liquid to grade.
5. Strike off excess material and allow to cure for 10 minutes at 70°F.
6. Open to traffic. Finish and blend with a grinding stone if desired.

DELAMINATED SLAB

1. Drill 3/8″ hole into the void.
2. Remove dust with a vacuum.
3. Inject Concrete Mender™ with the Easy Injection System.
4. Add a fine graded silica sand and additional liquid to fill holes to grade.
5. Strike off excess material and allow to cure for 10 minutes at 70° F.
6. Open to traffic. Finish and blend with a grinding stone if desired.

THRESHOLDS AND
UNEVEN SLABS

1. Clean out with diamond or wire grinder and remove dirt and dust. Score lower edge with diamond blade for a finished look.
2. Flood with Roadware 10 Minute Concrete Mender™
3. Add a fine graded silica sand and additional liquid to a mortar consistency.
4. Shape with a clean steel trowel and allow to cure for 10 minutes at 70° F.
5. Open to traffic. Finish and blend with a grinding stone if desired. Maintain existing expansion joint if necessary.

Read more: Proven 10-Minute Concrete Mender for Fast Repairs