DUCTILCRETE

CRACK REPAIR PROCEDURE - Min width 0.016in

Recommended for Cracks with a Minimum width of 1/64” (0.016 or .40 mm)

TOOLS

1.    4" Right Angle Grinder. 
2.    Diamond V Blade (3/8” wide). 
3.    Norton Blue Strip Disc (No substitutes).                             
4.    100# Flapper Wheel
5.    Vacuum with small nozzle.
6.    Small Compressor with needle tip nozzle. 
7.    Scraper & Razor Knife
8.    Hammer Drill with;
  •    1/4” X 6” L bit - used to drill pilot holes along the crack.
  •    5/16” x 4” L bit - used to re-drill the ¼” holes.

 

MATERIALS

1. Rapid Refloor

Note: For best color match to existing floors obtain a color sample kit from Metzger & McGuire. Sand the face of the color sample prior to use, the color will lighten from the sanding process.

2. Other low viscosity rigid epoxy/urethane.

 

CRACK REPAIR PROCEDURES

1. Chase the crack a maximum of 3/8” wide using the “V” Blade

 

2. Using a ¼’ diameter bit, drill 5” deep Pilot Holes @ 12” O.C.

  •   The drill bit should not touch the top edges of the “V” or chipping will occur.

 

3. Using a 5/16” diameter drill bit, Re-Drill all ¼” holes 4” – 5” deep.

  •  If the drill bit is chipping the edge of the ”V”, slightly widen the “V” to provide additional clearance.

 

4. Using a blade and or small chisel, clean the crack and remove any unsound concrete.

 

5. Using the 100# flapper wheel lightly sand down the face and edge of the “V” removing exposed fiber and creating a sharp edge (corner).

  •  Do not round off the corner.

 

6. Vacuum then blow out the repair.

 

 

7. Inject 4 pumps (handle squeezes) of Rapid Refloor into the injection ports (drilled holes).

  •  Allow the Rapid Refloor to begin to gel in the bottom of the crack approximately 5 – 10 minutes.  
  •  Continue injecting through the ports until the Rapid Refloor is within 1” – 2” inches from the top of the floor.

 

8. Remove any hardened Rapid Refloor from the face of the “V” using the 80# flapper wheel prior to installing the top layer of Rapid Refloor. 

9. Fill completely leaving it slightly high. 

12. Sand down the Rapid Refloor using a blue Norton Strip Disc. 

Note: The Norton Strip Disk will sand down the Rapid Refloor without burning up the edges.  

14. Install a light application of the densifier that was used on the existing floor. Back drag using a micro-fiber mop to remove excess. 

 

COMPLETED REPAIR

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Last Updated: 2021-03-19

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