How to Repair Cracks in Concrete

Concrete cracks are caused by many things-- earthquakes, water, tree roots, frost heaves, poor placement of seams between concrete slabs, even cement mixed with too much water. Whatever the cause of your concrete cracks, polyurethane repair product can give you a stronger faster concrete repair than anything else available.

It is essential to deal with concrete crack repair as soon as you notice a crack appear. Concrete cracks may start small, but if left unrepaired, are guaranteed to grow larger. If cracks become too large, or there are too many, the concrete may need to be replaced rather than repaired.

Standard concrete repair methods are time-consuming, require many tools and sometimes significant labor and can take a long time complete. Roklin's concrete repair products provide several options, ready for use on most any concrete repair project. Using Roklin’s simple methods, there is no need for major preparation—no grinding, drilling, pressure washing or saw-cutting cracks. Simply sweep or blow out the damaged area, mix your materials and apply for solid concrete crack repair.

Whether you have basement concrete cracks, concrete foundation cracks, concrete slab cracks or cracks in concrete walls the process is basically the same. See below for recommendations

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 material out. Wipe up any excess material and allow to dry for 30 minutes. Now the crack is filled and ready for use. Note: cracks in concrete walls are better handled with the standard dry-wall patch.

Concrete Crack Patch
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 patch with almost no interruption of service.

First ensure that the damaged 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. 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 damaged area becomes sufficiently 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 surface. In colder months or when there is little time for the repair, catalyst can be supplied as an additive to speed the reaction. The newly-filled cracks can be ready in less than an hour.

Concrete Welder and FlexSet are available for purchase through the Roklin web site at www.roklinsystems.com or call 1-888-FlexSet. Other concrete and asphalt repair materials for large and small repairs are also available.