Duromar CrackFil

High-Performance Crack Filling Putty

DUROMAR CrackFil is a fast-curing, 100% solid epoxy compound designed for repairing and sealing cracks in concrete, metal, and other hard surfaces. It offers a smooth, even finish that can be easily overcoated with DUROFLOR® linings or maintenance coatings. Its strong bond, chemical resistance, and easy application make it an ideal choice for industrial and commercial environments that require durable surface restoration.

CrackFil Seals Cracks Fast & Clean

CrackFil delivers high-performance results by curing quickly, achieving a functional cure in as little as 8 hours. It fills both hairline and deep cracks efficiently, creating a seamless surface ready for coatings. With its non-toxic formulation and ability to cure at temperatures as low as 40°F, it offers flexibility and reliability for on-site repairs.

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Duromar CrackFil Features

  • Fast-Curing Crack Sealer
  • Cures In Temperatures Down To 40ºF
  • Non-Toxic, Odor-Free Formula
  • Strong, Reliable Bond Strength
  • Easy And Efficient Application

FAQs About Our Duromar CrackFil

CrackFil can be applied to properly prepared concrete, metal, and similar solid substrates. Surfaces must be clean, dry, and abraded to ensure maximum adhesion. For best results, abrasive blasting or mechanical preparation is recommended before application to create a firm surface for the epoxy to bond effectively.

At 70°F, CrackFil becomes tack-free within 2 hours, functionally cured in 8 hours, and reaches full cure in 48 hours. When exposed to higher temperatures, curing can accelerate. For demanding conditions, a force-cure cycle can be used to strengthen the chemical and physical properties of the repair.

Yes. CrackFil is suitable for filling both fine hairline cracks and larger, deeper fractures. Its dense 100% solid epoxy formula allows for flexible use and excellent coverage, depending on the width and depth of each crack. One kit can theoretically fill up to 640 linear feet of ½” deep by ⅛” wide cracks.

CrackFil can be applied and cured at temperatures as low as 40°F, allowing year-round use. For optimal performance, the material should be stored and mixed around 70°F before application. It can withstand dry operating temperatures up to 250°F once fully cured.

No. CrackFil contains no toxic fumes or flammable materials. It is a 100% solids, solvent-free epoxy that can be safely applied in ventilated areas. Always wear protective gloves and eyewear during application and cleanup for safe handling.

Yes. CrackFil can be overcoated with DUROFLOR® linings or other compatible coatings once the surface is stable and not disturbed by the process. Because it cures rapidly, overcoating can typically begin almost immediately, allowing for efficient project turnaround and enhanced chemical resistance.

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