New Full-depth Hairline Crack Injection Breaks the Rules

Roadware 10 Minute Concrete Mender™ and Easy-injection mixers make full depth crack repairs in hairline cracks without cutting. This less evasive crack repair technique breaks the rules for concrete repair.

Broken Rule One
 Hairline cracks are not worth the trouble fixing.

 

Broken Rule Two
 You have to cut open a hairline crack if you want to actually repair it.

 

Broken Rule Three
Crack injection requires pumps, ports, slow epoxy, and lots of time.

 

Lets look at these, “rules” one by one. 

Broken Rule One: Hairline cracks are not worth the trouble fixing. Did you know that just about every crack in concrete started out as a hairline crack? Some so fine, you can not even see them with the naked eye. Cracking naturally occurs in concrete slabs as the concrete cures and shrinks. We use saw cut control joins to encourage the concrete to crack inside the saw cut or tooled joints. The problem is, the concrete doesn’t always listen and can crack where it wants to crack. We don’t like it, but that’s just the way it is. The truth is, we would fix hairline cracks if there was a good and efficient way to do it. Most of the time, we ignore hairline cracks and blame them on the nature of concrete and say things like, “It will be fine, you still have aggregate interlock and the crack is just on the surface.” Or, “All concrete cracks, and its just the nature of the product… Check out our new floor covering selection.” The customer, who just invested in a new concrete floor, is never happy with these explanations.

The truth is, we would fix hairline cracks if there was a good and efficient way to do it.

Scoring a concrete crack with a diamond grinder.

Broken Rule Two: You have to cut open crack if you really want to repair it.  A repair material has to actually get into a crack so it will actually do some good. Anything short of that is no better than caulk. For the most part, this is true. We can’t repair what we can’t reach. Traditional cut and cover techniques us a diamond blade saw to open up a crack, forming a shallow well for Concrete Mender to accumulate and flow down into the crack. It works really well and Roadware has been doing this for over twenty years.

What is needed is a way to actively push repair products into hairline cracks. With a few simple techniques and Easy Injection Mixers, Roadware 10 Minute Concrete Mender can do the job. That brings us to:

Broken Rule Three: Crack injection requires pumps, ports, slow epoxy, and lots of time. 

For a successful crack injection repair you need to accomplish three things:

  • Delivery of materials to the repair area.
  • The repair material needs to set before if flows away from the repair area .
  • The repair has to be structurally effective.

Roadware Easy Injection mixers make getting Concrete Mender cracks as small as 20 mil (0.02 inches) simple. Just drill a 3/8 inch  hole into the crack and push the nearly water thin Concrete Mender into the cracks. You can actually watch  the Concrete Mender flow along the length of the hairline crack. Leave the expensive injection pumps in the shop. A cartridge of Concrete Mender and a manual application gun is all you will need.

Roadware 10 Minute Concrete Mender starts to thicken and cure in about 5 minutes after application, so the material will stay where you put it. Traditional injection epoxies take hours to cure. In many cases,  at the end of the day, the epoxy all ends up under the slab and no longer in the crack.

Diagram showing Concrete Mender Soft-tip mixer injection into a concrete slab.

 

Roadware 10 Minute Concrete Mender™ with Microdoweling™ penetrates traditional bond lines and repairs concrete from the inside out. This structural polyurethane will not become brittle over time. Epoxy injection resins become very hard and brittle. As the the concrete deflects under traffic, the brittle epoxy will start grinding away at the bond-line and the deterioration will start all over again. Roadware 10 Minute Concrete Mender is designed to restore aggregate interlock and  deflect with the concrete under heavy traffic and loading. This structural polyurethane will not become brittle over time and is designed to bring the cracked concrete back to original pre-cracked condition.

 

 

 

Roadware 10 Minute Concrete Mender with Easy-injection mixer repairing a hairline crack.

 

Concrete Mender crack injection into 24 inches of concrete.
Concrete Mender crack injection into 24 inches of concrete. Notice the material penetrating full depth.

 

 

 

Hairline cracks less than 20 mil across repaired using Roadware 10 Minute Concrete Mender and Easy Injection application. UV Forensic Photography. See More Here

 

Getting Started

80300 Roadware 10 Minute Concrete Mender 600ml Cartridge

Roadware 10 Minute Concrete Mender 80300 600ml Cartridge.

1006-STR Easy Injection Mixer

1006-STR Roadware Easy Injection static mixer for Roadware 10 Minute Concrete Mender 600ml Cartridge.

5300C 300x300ml Application Tool

Roadware 5300C 300ml x 30ml cartridge application tool.

 

5 thoughts on “New Full-depth Hairline Crack Injection Breaks the Rules”

  1. Im interested in the hairline concrete mender. Have a small crack around my pool deck, price with shipping.

    Thanks

    Phil

  2. I have enjoyed reading the information about concreting work. Really, entire discussion is more helpful and all the tips are more effective too. I am very glad to go through this kind of helpful article. Thanks for sharing a nice article.

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