What You Need to Know About Roadware 10 Minute Concrete Mender

If you’ve recently purchased Roadware 10 Minute Concrete Mender from Resinous Flooring Supply, you may have some questions – we’re here to help. Read below for everything you need to know about this product:

What is this product?

Roadware 10 Minute Concrete Mender allows you to repair both cracks and spalls quickly and easily. This product is a revolutionary 2-part hybrid urethane that’s almost as thin as water and won’t pop out like epoxy, as it never gets brittle.

The 10 Minute Concrete Mender Difference:

• This product sinks deep into concrete to make lasting repairs. It’s almost as thin as water (9-cps) and injects itself into the matrix of the concrete. The material shores up the existing concrete in addition to making the repair, and eliminates the bond-line.
• Permanent repairs are made in just 10 minutes. Shortly after being applied, the product cures to a 4,500-psi polymer concrete which transfers heavy loads through the area of repair. Say goodbye to pop outs!
• Cures in 10 minutes at 70 degrees (F) or 21 degrees (C). Works in temperatures below -20 degrees (F) or -28 degrees (C). Can be polished. Doesn’t get brittle. Easy to apply. Free of epoxy and polyurea. Easily mixed. Non-flammable. Low VOC’s. Paintable & coatable. Sandable. Adheres to USDA guidelines.
• Needle tip mixes available for more precise application
• Self-mixing at application point. Use a 1:1 ratio 600 ml cartridge application gun.
• Can be injected fully into crack depths without using pumps or ports, thanks to the Sift-Tip injection mixers
• Can be mixed and applied in bulk for larger applications.
• Can be extended with sand. One gallon of 10 Minute Concrete Mender makes approximately 2.2 gallons of material for repair when combined with 2 parts silica sand (2 times more than the yield of epoxy or polyurea)
• Can be applied at temperatures below -20 degrees (F) or -28 degrees (C)
• Accepts polishing or most coating systems in approximately 10 minutes at 70 degrees (F) or 21 degrees (C)

Additional Information:

• Structural Polyurethane: This product is a polyurethane-based material which restores both aggregate interlock and structural integrity to distressed concrete. This is done by using low surface tension/low viscosity and cross-linking polymer chains to both penetrate concrete surfaces and bond directly to the concrete-aggregate matrix. This bonding is made possible through capillary forces that self-inject polymer chains into the surrounding concrete. The material should have a modulus of elasticity less than the surrounding concrete, and shouldn’t become brittle as time goes on.  It can be combined with manufactured sand to create a PCC-compatible polymer concrete that structurally repairs cracks and spalls in concrete.
• Benefits: Total saturation bonding of cracks is easily achieved due to the product’s low surface tension and viscosity. Preparation is minimal, and all that is usually required is removing loose debris. Manufactured sand or quartz can be introduced into the repair if necessary to prevent material waste and under-slab ponding. Repairs greater than 0.125” can have specified sand added at a ratio of 2:1 sand to polyurethane as the crack is filled, extending the material and adding strength. Sand can also be used to bring the thermal coefficient of material expansion closer in-line with surrounding concrete. Repairs ready for traffic in about 10 minutes at 72 degrees (F) or 22 degrees (C).
• Important Notes: Surrounding concrete must be surface dry and cured for at least 60 days. Completed repairs may take on a yellow appearance over time due to UV exposure. Only use this product for low-to-non-movement cracks in outdoor conditions.

Bulk Application Instructions for Spall and Crack Repairs:

• Use for spalls and cracks wider than ¾”
• Clean cracks and spalls downs to solid white concrete
• Remove dust and debris before application
• Pour 4 oz of Side A into a measuring bucket/pail/container
• Pour 4 oz of Side B into a measuring bucket/pail/container
• Note: Always mix 10 Minute concrete Mender at a 1:1 ratio by volume
• Combine Side A and Side B into a larger bucket/pail/container. Mix by hand for approximately 10 seconds. This will yield 8 oz of mixed material.
• Immediately add between 16 to 20 oz of silica sand. Mix with a trowel.
• Mix until both sand and material are well-blended. This takes around 10 seconds.
• Tap the side of mixing bucket/pail/container to judge proper sand/liquid ratio. If mixture appears to be wet, it is the correct ratio. Quickly place material into the prepared repair area. Priming with pure material is not needed if concrete is clean and sound.
• Trowel a portion of the material back to ensure you are wetting the concrete surface
• Trowel off the material as needed
• After 10 to 15 minutes at 70 degrees (F), blend repair into surrounding concrete using a rub brick, grinder, or polishing tool
• Utilize additional silica sand as a grit for a smooth finish

Delamination Repair & Topping Slabs:

• Method 1: Drill multiple 3/8” (1 cm) holes into the concrete, down to the delamination. Remove all dust with a shop vacuum. Inject pre-mixed 10 Minute Concrete Mender with a Roadware Easy-Injection Mixer. Ensure the material is filling the delaminated area by maintaining a good visual while working. Once filled, holes may be blended into surrounding concrete with a finishing stone, or they can be re-drilled ¼” (5mm) deep and filled with a color to match the concrete mortar.
• Method 2: Use a dry diamond drill to create a 2 to 3-inch (5 to 8 cm) diameter hole into the concrete slab, down to the delamination. Remove dust with a shop vacuum. Pump 10 Minute Concrete Mender into the void. Use 1 to 2 inches (3 to 5 cm) of head pressure to push the material as far as 10 feet (3 m) into the delamination.

Assembling the Cartridge:

• Hold cartridge upright
• Remove clear overcap
• Locate the flow controller under the overcap
• Place the flow controller in alignment with the cartridge openings
• Remove black plugs from cartridge. Keep these on hand for later.
• Place static mixer over cartridge openings
• Place retaining nut over static mixer
• Secure retaining nut
• Hold cartridge upright and place in dual cartridge gun
• Hold gun and cartridge upright and lightly squeeze the gun to remove excess air from cartridge
• Tilt cartridge from side to side and lightly squeeze gun to remove excess air from cartridge
• Dispense a small amount of material to begin the mixing process. Note that the cartridge should remain pointed down once material has begun to flow.
• Depress thumb trigger on gun to stop the flow of material

Full Depth Crack Injection:

• Drill a hole with 3/8” diameter approximately one inch deep into the crack at various points along the split. Clean the crack and holes with a vacuum.
• Tape off the split and the areas around your drilled holes with clear, strong tape. Avoid using packaging tape.
• Prepare a cartridge of 10 Minute Concrete Mender using the instructions above. Remove all air from the cartridge and insert the nozzle into the first hole you drilled.
• Carefully squeeze the handle of the application gun to slowly inject the product into the crack. Use the product in several holes at a time, moving the cartridge back and forth among them. Give the product time to gel into the bottom of the split. Once the crack is filled completely, you will notice the product flow under the clear tape from one drilled hole to another.
• Once the crack is completely filled, move on to another set of drilled holes until the repair is complete.
• After 10 minutes at 70 degrees (F) or 23 degrees (C), remove the tape. Use a razor scraper, grinder, or polishing device to remove excess material and blend the repair.

Common Questions:

How large of a crack can I fix?

This product repairs cracks and spalls of all sizes/depths.

Can this product be used for an overlay?

10 Minute Concrete Mender can be used in small areas. The quick curing ability of this product can cause difficulties with smooth coatings over large areas.

Can I use 10 Minute Concrete Mender in a freezer?

Yes, this product works well in both freezers and coolers. However, you must adhere to certain exceptions when applying: Keep the sand and material at room temperature and allow for additional curing time, ensure the floor is free of frost or ice, use a propane torch or electric heat guns to dry the repair (if needed).

Does this product have a certain shelf life?

Yes, when stored properly, 10 Minute Concrete Mender is guaranteed to last for one year. Bulk materials packed and stored in sealed cans will last one year or longer, when stored in a cool, dry place. Open containers should be resealed and stored with a head of dry-grade nitrogen to prevent contamination from moisture. Simply use a tank, regulator, and an air hose with a trigger valve at the end to add nitrogen to the cans before resealing.

Can this product be air shipped?

Yes, Resinous Flooring Supply can air ship this product to you, as 10 Minute Concrete Mender is IATA/DOT regulated and non-hazardous.

What type of sand should I use for 10 Minute Concrete Mender?

The best type of sand to use is dry white silica/sandblasting sand that has a gradation close to that of table sugar. For thin hairline cracks, a finer sand can be used. For large repairs, a courser sand can be used. Do not use play sand, beach sand, or concrete sand, as they contain too much dust and moisture.

Can I reuse the mixer?

Yes. If you remove the mixer from the cartridge immediately after use and empty it out completely, the mixer is reusable. The same principle applies to the flow restrictor.

Can I use 10 Minute Concrete Mender to repair my driveway?

This product is designed for concrete repair professionals. Do not attempt to use this product inside the home or on a residential area if you are not a professional. Training is required to safely use the highly-reactive two-component polyurethanes.

Additional information, photos, and videos regarding this product can be found at https://concretemender.com/products/roadware-10-minute-concrete-mender-2/.