Concrete Crack Filler

Crack Filler™

60% Solids Hybrid Urethane

Concrete Crack Filler

CRACK FILLER is an extremely fast drying 60% solids hybrid urethane. This product has an ultra-low viscosity and can be utilized in colder temperatures.  Blended with clean dry sand it can be used to quickly rebuild and fill large spalled or damaged concrete surfaces. Broken joints can be filled and recut neatly prior to the application of a coating.

Quick Facts: Crack Filler™

Solids Content – 60% by weight
Pot Life – 2 minutes 

Dry Time:
   Tack Free – 4 to 5 minutes
   Ready for Traffic – 10 to 15 minutes 

Application Temperature – 40° to 80° F

VOC Content – < 420 g/L


      1-Gallon Kits
      2-Gallon Kits


One gallon will fill 243.3 cubic inches of volume. As a point of reference, one gallon will fill 324 linear feet of joint ¼” wide by ¼” deep. Coverage rates will vary greatly depending on surface porosity and application method. Avoid the thick build of Crack Filler. The use of clean, dry sand can help extend into deeper areas.



Mix a small amount to familiarize yourself with the characteristics and set times of the material. This will keep you from wasting mixed material later as you use it. Full kits of this product should not be mixed at one time. Set time is too fast to work with less than small quantities, 8 – 16 oz at a time. Each component should be mixed thoroughly with individual tools prior to blending. Using the same tool to mix part A then Part B will cause contamination and ruin the material being saved for future use. Crack Filler is to be mixed at a ratio of 1 part A to 1 part B. In clean mixing containers, pour the correct ratio in and mechanically mix for 15-45 seconds with a stir stick. The amount of material mixed should only be what can be utilized within the 2 minutes of pot life.


Cracks should be chased out with a Diamond blade or V blade to allow material to flow into cracks or joints easily. Spalled areas should be roughed up with a chipping hammer and cleaning them with a twisted wire wheel. Make sure the surface is clean of any loose concrete or contaminants prior to application. The area to be treated must be completely clean and dry. If the crack or hole is large, fill them first with clean and dry sand, preferably a blend of 40/100 grit to allow for maximum strength when cured. Do not mix more material than can be spread during the pot life of the product. If the material gets sticky and isn’t pouring smoothly anymore, discard the remaining material. Small amounts should be mixed in small containers such as dixie cups or small plastic measuring cups. When the product is cured, it must be abraded prior to coating. This can be done with a diamond cup wheel or during the grinding process of a floor.