Concrete Mender™ Cartridge Application Instructions

STOP: See Cartridge Assembly Instructions First.

Applies to Concrete Mender™ and Concrete Mender VO™ Low Odor.

Tools RequiredCracks and JointsSpallsTrouble ShootingRecapping and Reusing Cartridge

Safety Glasses


Safety Glasses


Shop Vacuum


Margin trowel and knife.


Razor Scrapper


Angle Grinder with diamond blake.


Manufactured sand or quartz. 4030 grit or similar.


Roadware 300x300ml dual cartridge application tool. #5300


Clean out cracks with a diamond grinder or a wire brush.


Use a shop vacuum or compressed air to remove dust.


Apply a layer Concrete Mender™ to the repair area.


Add specified sand and additional Concrete Mender™ in layers. Make sure to fully saturate the sand.


Strike off excess sand and Concrete Mender™ and allow to cure for about 10 minutes at 70°F (21°C).


Use a razor scrapper to cut the repair flush with the concrete surface.

stepc7Use a finishing stone or similar device to blend the repair with the surrounding concrete.


Clean repair area. Remove all dirt, oils, and loose debris. Make a 1/4″ relief cut with grinder.


Remove any dust with a vacuum or compressed air.


Pre-wet entire spall with 10 Minute Concrete Mender™.


Immediately add 1/2″ of silica sand and completely saturate with 10 Minute Concrete Mender™. Continue in 1/2″ lifts. Make certain all of the sand is saturated.


Use a margin trowel or taping knife to smooth and shape the sand and material mortar.


Finished repair is open for all traffic. Any staining due to over banding will quickly wear off or can be removed with a light sanding.

Every reasonable effort is made to insure that every cartridge of Roadware 10 Minute Concrete Mender™ is easy to use and trouble free. Below is a list of possible problems, their causes and suggested solutions. For more information, please call Roadware Technical Service at 800-522-7623 or e-mail us at


Possible Cause


Material does not cure. Material was not mixed properly Make sure all start-up procedures are followed. Check for any blockage of cartridge openings.
Material is slow to cure Low ambient temperature This material will set in approximately 10 minutes at 72° F. Cooler concrete and sand temperatures will increase cure time.
Cartridge is hard to pump or surges off ratio. Rear plunger is sticking. Slight leakage (mostly found in partially used cartridges) has caused the “A” (light colored) material to crystallize on the plunger causing sticking and surging. Carefully rim the skirt of the plunger seal with a small, flat screwdriver.
Material has cured inside the static mixer or Flow Controller. Replace static mixer and Flow Controller if needed.
Cured material shows intensive marbling and striations.  Inadequate mixing. Follow start up procedures carefully. Make sure all air pockets are bled off before application. Use medium even strokes when applying material.
Improperly placed or missing Flow Controller. Make sure the holes in the Flow Controller restrictor line up with the openings in the cartridge. Hold the static mixer in place when securing the retaining nut to prevent the Flow Controller from twisting.
Material foams, bubbles, or grows when curing. Moisture is in contact with the material. Make sure sand is dry. When concrete is damp or green, dry with a heat gun or propane torch. Apply a layer straight 10 Minute Concrete Mender™ to the area. Allow to cure and continue the repair.

Clean up

Wipe tools clean with a rag before material is allowed to cure. Cured material may be removed by abrading with a wire brush or soaking in acetone, xylene, MEK, or epoxy thinner. USE EXTREME CARE WHEN WORKING WITH INDUSTRIAL SOLVENTS.

10 Minute Concrete Mender™ is very aggressive and will stain exposed skin. Gloves should be worn to keep material from contacting skin. In the event of skin contact, remove immediately with an industrial paint and stain hand cleaner.


Disposal Methods

Empty cartridges may be disposed of with normal waste disposal methods in accordance with Federal, State, and local environmental control regulations.

Unused material is best disposed of by mixing equal parts of side A and side B and allowed to cure in a waste container. Cured material may then be disposed of with normal methods.

ACTION TO TAKE FOR SPILLS/LEAKS: Properly protected personnel should contain spill. Ventilate area, cover spill with sawdust or other absorbent material. Scoop and place in open container and treat with decontamination solution (93% water, 5% ammonia, 2% detergent). Leave open in a ventilated area for 24 hours.

DISPOSAL METHOD: Bury or landfill decontaminated waste in accordance with Federal, State, and local environmental control regulations.


Content 4


Hold cartridge sideways over a waste container and remove retaining nut, mixer, and Flow Controller.

stepe2Bleed off a few drops of material to clear out any cured product. Clean Flow Controller and save for future use or replace.


Hold cartridge upright and place D-rings into the top ports. Place overcap on cartridge.
Store upright in a cool, dry place. Material will remain usable for a varying amount of time depending on the moisture level of the storage. Signs of moisture contamination are heavy caking and crystallization of the A-side material at the D-rings and the rear seals.

To reuse cartridge, follow normal start-up procedures.

Workers may be exposed to dangerous levels of silica dust when cutting, drilling, grinding, or otherwise disturbing materials that contain silica. These materials and tasks are common on construction jobs. Breathing that dust can lead to serious, often fatal illnesses.  Click here to learn how to work safely with silica.

Commercial and Industrial Concrete Repair Products