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Nomaco’s engineered construction foam materials are designed for use in commercial, residential, municipal, civil and industrial projects. Our comprehensive product line includes materials that are used as concrete forms, or as fillers for concrete expansion and contraction joints almost anywhere concrete is used including:

  • Driveways
  • Sidewalks
  • Roadways
  • Airport runways
  • Bridges
  • Curbs
  • Medians

Nomaco gasket foam products are used as a moisture and air infiltration barrier for marriage walls on modular and log homes. Our joint filler and gasket products are made from extruded polyethylene and polypropylene materials open-cell, closed-cell and bi-cellular foams that have the durability, flexibility, and strength to meet the demanding performance requirements of these applications.

Our foam tubes, sheets and planks are by nature:

  • Durable
  • Lightweight
  • Impact resistant
  • Chemically inert
  • Mold resistant
  • Non-exuding
  • Virtually dust-free
  • 100% recyclable
  • Made in USA

Joint Fillers

Nomaflex Image

Nomaflex®, named as one of the 2017 Most Innovative Products at World of Concrete, is a closed-cell extruded polypropylene foam joint filler that is easy to handle and extends the service life of concrete by acting as an insulator for contraction and expansion joints.

 It is supplied in 5’ and 10’ lengths and 3-1/2” through 6” widths. Click here to learn more. 


Fastflex™ (formerly branded as Isoflex) is a closed-cell polyethylene foam joint filler that is supplied with a convenient tear-off strip. When the tear–off strip is removed, it creates a void for the sealant in order to prevent surface cracking. Fastflex is available in continuous lengths in wall thicknesses of 1/4” through ½” and widths from 1” through 6”. Click here for product sheet.

Backer Rods

SOF Rod Image

SOF® Rod is a bi-cellular polyethylene foam backer rod product. It is extremely flexible and can be used with cold-applied sealants. SOF Rod is non-gassing to prevent sealants from bubbling and failure. It is available in 3/8” to 4” diameter. Click here for product sheet.

HBR image

HBR® is a closed-cell, polyethylene foam backer rod joint filler that is used as a backing material for elastomeric and other cold-applied sealants. It helps the sealant assume the optimum shape to prolong service life and acts as a barrier to the flow of sealant through the joint. It will not absorb water and is available in ¼” to 6” diameter. Click here for product sheet.

HBR XL Image

HBR XL is a cross-linked high temperature foam backer rod joint filler. It is commonly used with hot-pour sealants up to 410 degrees F. HBR XL is white in color and available sizes from 3/8” to 2” in diameter. Click here for product sheet.

OCFoam Image

OCFoam™ is an open-cell polyurethane foam backer rod that is used in window glazing and other applications that require polyurethane sealants. It is available in yellow or black color and sizes from 3/8” to 2” diameter. Click here for product sheet.

Product Selection Guide


image24Nomaco offers SOF Seal and SOF Seal Plus foam gaskets to prevent leakage and air infiltration on marriage wall joints in factory built, modular and double-wide homes. SOF Seal and SOF Seal PLUS are economical, have low water vapor permeance and perform better than fiberglass. Click here for SOF Seal product sheet.

image25SOF Seal and SOF Seal Plus are made from flexible, polyethylene foam, have a non-absorbing outer-skin and have a resilient interior of both open and closed-cells. Click here for SOF Seal Plus product sheet.

Nomaco’s brands are highly recognized in the construction industry and are available by a large network of distributors. Nomaco proudly participates in and sponsors leading industry associations.

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