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Nomaflex® and Isoflex™ are expansion joint and isolation joint filler products used in residential, commercial, civil, municipal and industrial applications.

Find us at World of Concrete in Las Vegas, NV on January 23-26, 2018 in booth N2863.  Learn about our new tool that rounds out the Nomaflex system.


Video: Setting a New Standard in Concrete Joint Construction



Named as one of the 2017 Most Innovative Products at World of Concrete, Nomaflex is easy to handle and extends the service life of concrete by acting as an insulator for contraction and expansion joints. It can be used with hot-pour or cold-applied sealants. Nomaflex prevents three-sided adhesion and can be used without a bond breaker. It also has no odor or sticky residue and is resistant to oils, gas, salts and other chemicals.

Nomaflex can be stored outside and will not absorb water, break, flake or leach. It is flexible, yet rigid enough to be passed across a wet pour and can be used as a form. Nomaflex is less expensive to install and can be installed using traditional installation methods. Common residential, commercial and industrial installations using Nomaflex include, but are not limited to: sidewalks, streets, driveways, highways and airport runways.

Nomaflex was tested per ASTM D 8139,  D 545 and D 1751 and complies  for extrusion, compression recovery and water absorption.

The intrinsic properties of Nomaflex include:

  • Waterproof
  • Ultra lightweight
  • Flexible
  • Does not impede sealant cure time
  • Durable
  • Clean product
  • Less breakage
  • Inert
  • Easy to use, same installation methods as currently used
  • Can be used with hot-pour and cold-applied sealants
  • Recyclable / reusable
  • Made in USA


Isoflex (formerly branded as Flat Rod) extends the service life of concrete by acting as an insulator in isolation and expansion joints, while acting as a bond-breaker for sealants. Isoflex is an ideal choice for concrete joint filler applications around footings, foundations, structures, and curved or round bases and posts.  Typical projects include walkways, parking decks, curbs and gutters, concrete slabs, swimming pools,  and driveways. Isoflex is is a closed-cell polyethylene foam joint filler and is available in continuous lengths in wall thicknesses of 1/4” through ½” and widths from 1” through 6”.


“Wanted to send you an email to let you how great the Nomaflex works for us. It is a great product and so much easier to store and use without worrying about rotting and breakage. The look is so much better and the customers we use it for like it a lot.”
Jimmy Whitley, Jymco Construction Company, NC

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