Concrete Crack Repair

Our products provide complete concrete crack repair solutions in easy to use kits. Our patented polyurethane based products provide the strongest concrete crack repair solution available.

Concrete cracks are caused by many factors including exposure to weather, extreme temperatures, frost, and moisture, as well as tree roots under concrete slabs, shifting concrete foundations, concrete slab leaks, and even cement mixed with too much water. Repairing concrete cracks as soon as they occur greatly reduces the chances of further damage to the concrete surface. Unrepaired concrete cracks may start small, but as water and moisture penetrate beneath the surface of the concrete, the existing crack grows. Moisture is one the biggest factors in the deterioration of concrete surfaces such as parking lots and driveways. An untreated concrete crack allows moisture to not only make the existing crack worse, but the also allows the under slab foundation to become saturated, which in turn allows the concrete surface to shift, creating new cracks in the process. If the problem becomes too severe, the entire concrete surface will be beyond repair, and a complete replacement may be the only solution.

Concrete cracks are categorized in three ways: below-hairline, large, and foundational. Our FlexSet and Concrete Welder kits are suitable for each type of concrete crack. If you’re not sure which product is right for your project, please contact us and we will assist you.

How to Repair Different Types of Concrete Cracks:

Hairline Cracks

Sealing concrete cracks can be done simply using Concrete Welder, available in a cartridge format. Make sure the crack is clean and free of moisture. Open cartridge and squeeze Concrete Welder directly into the crack. Use a scraper or straight-edge to smooth the Concrete Welder out. Wipe up any excess material and allow to dry for 30 minutes. Now the crack is filled and ready for use.

FlexSet for Concrete Repair

FlexSet 5 Gallon Bucket
FlexSet 3 Gallon Bucket

FlexSet is supplied in three and five gallon kits with pre-measured amounts of chemical and aggregate in each container. Each 5-gallon kit will deliver 0.4 cubic feet which will cover approximately 50 square feet at a thickness of 1/8".

FlexSet Crack Repair components can be mixed in the bucket it comes in with a hand drill, or in our low cost Motor Mix Machine. The material has a 6-8 minute working time at 75ºF.

Concrete Repairs can be completed using FlexSet Concrete Repair in minutes with a few simple steps. There is no need for saw cutting or use of a primer. The resulting repair can be put back into service in as little as 30 minutes.

Listed below are some of the advantages that FlexSet Concrete Repair Product offers vs. conventional materials:

  • Minimal preparation required
  • No costly demolition necessary
  • Set-up in less than 10 minutes
  • Odorless & vapor-less
  • Exceptional bond to concrete
  • Unaffected by extreme heat or cold
  • Seals & waterproofs
  • Good chemical resistance to oils, fuels, and antifreeze
  • Outstanding durability
  • High-traction surface

Large Cracks

To repair a crack in concrete that is quickly widening, use Roklin's FlexSet Concrete Repair Product. FlexSet provides a fast-setting repair that will be a stronger concrete crack repair with almost no interruption of service.

First ensure that the concrete crack repair area is clean and dry. Sweep or blow out cracks so there is no loose debris. Place the aggregate provided in the FlexSet package to fill in the deeper area of the crack, without going above the damaged area. Using FlexSet, carefully pour contents of bottle “a” into provided 5-gallon bucket then add special sand. Next, shake bottle “b” thoroughly and pour into sand mixture. (In colder months or when there is little time for the repair, catalyst can be supplied as an additive to speed the reaction.)Mix with a paddle-mixer, using a drill. When mixture is completely wet, pour FlexSet onto damaged area and use a trowel or lute to smooth material into cracks. When cracked area becomes smooth, toss topping sand by hand over repaired area to create a uniform look and feel. The new repair can be ready in less than an hour.

Concrete Foundation Cracks, or Concrete Slab Cracks

For concrete foundation cracks or concrete slab cracks, use FlexSet to stabilize and fill any voids. The polymer-based repair works in areas where the cracks are deeper and wider, the material flowing down to fill the entire space. With no saw-cut or demolition required, the preparation is quick and easy.

Make sure that the damaged area is clean and dry, with no loose debris. Place the aggregate provided in the FlexSet package to fill in the deeper area of the crack, without going above the damaged area. Using FlexSet bottle “a”, carefully pour contents into provided 5-gallon bucket then add special sand. Next, shake bottle “b” thoroughly and pour into sand mixture. Mix with a paddle-mixer, using a drill. When mixture is completely wet, pour FlexSet onto cracks and use a trowel or lute to smooth material into cracks. When cracks are smoothed out, toss topping sand by hand over repaired area to create a smooth finish.

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