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Backer Rod Denver Foam Yellow Open Cell Concrete and Asphalt Crack Foam

Backer Rod Denver Foam five eights by 100 foot coil example
Backer Rod Denver Foam five eights by 100 foot example master bag
Backer Rod Denver Foam five eights by 100 foot example bale
Backer Rod Denver Foam five eights size example
Backer Rod Denver Foam three quarter size example
Backer Rod Denver Foam one and a half inch size example
Cleaning an asphalt crack with a five-in-one tool
Stringing out the Backer Rod to be placed into cracked asphalt
Initially push the Backer Rod into an asphalt crack
Installed Backer-Rod, 1/4 inch in depth
Five-in-one tool pressing in backer rod

Ordering by Phone? Make sure you have the right product. Check the Product SKU List below.

Yellow Backer Rod Asphalt Crack Foam Mini Bags
List price: $84.99
Starting at
Free Shipping to lower US 48
In Stock
Quick Overview: 
  • Open cell foam tubing made for crack filling backer
  • Great for asphalt or concrete and works better than sand
  • Lasts for several years
  • Reduces wasted crackfill material


Asphalt Crack Backer Rod is designed for the purpose of "Pre-Filling" cracks in asphalt or concrete, that are deeper than 1/2" in depth where a sealant will be applied to the crack over the foam.  This reduces the amount of sealer needed and provides a longer lifespan of the sealants with minimal future maintenance.

This foam backer is an open-cell polyurethane that expands and seals the crack prior to the crack sealing process so that the new rubber material won't bottom out in the crack, this also saves you a great deal of material.

Some Asphalt Crack Filling professionals use fine sand for this purpose. Using sand works well in most applications and is usually easy to come by. On the downside, the problem you may encounter using sand is that when the crack expands (and it will) due to heat or cold temperature changes, the sand has a tendency to fall deeper into the crack or as the crack widens the sand will not support new sealer.

Asphalt Crack Backer Rod is installed so it "Pushes" against the side of the crack and as the crack widens, the Backer Rod widens with it because it is constructed from foam rubber.

Asphalt crack backer rod is very easy to install and as the pictures to the right show, simply push the Rod material down into the asphalt crack so you have approximately 1/2" of depth from the rod to the asphalt surface. Next, pour your new Asphalt Crack Filler on top. Both hot and cold-applied sealants can be used with this backer rod, per ASTM-D-5249-95 making it a versatile product that can be applied between temperatures of -60°F to +500° F with an ignition point of 700ºF to 800ºF. It doesn't really matter which hot-applied crack filler you want to use, you won't hurt the backer rod.

Being an open-cell material, this foam allows air to pass through the foam which makes your sealant fully cure all the way through.

We stock quite a few different sizes of Backer Rod Denver Foam with the main image above shows a 100' X 5/8" roll

Choose between mini bags for small projects, master bags for medium projects, and super bundles for large contractor projects.  (Super bundles are available via phone orders only.  Call for details +1(800) 689-2098)

It is advisable to order some random diameters and lengths if you plan on repairing a large area such as a driveway or parking lot. If you order through the website and need different sizes, choose the size from the "Add to Cart" dropdown, then come back to this page and choose a different size and also add it to your cart.

If you are still unsure, ask your salesperson about Asphalt Crack Backer Rod installation and application information.

Packaging Information

Master bags are compressed and wrapped with a plastic sleeve to reduce the overall shipping size.

Super bags are compressed even further. Upon arrival, Super Bundles (available via phone orders) should be opened immediately upon receiving to ensure proper rebounding.

Shipping Details

  • Sleeved individual Master Bag 14” x 20” x 22” @ 8 lbs. Each
  • Super Bundle 20” x 24” x 40” @ 85 lbs. Each

Color Code


Mini Bag

Master Bag


3/8" (10mm)

200' (61m)

4 x 900' = 3600' (1097m)


5/8" (16mm)

100' (30m)

4 x 500' = 2000' (608m)


7/8" (22mm)

100' (30m)

3 x 350' = 1050' (318m)


1-1/8" (29mm)

75' (23m)

2 x 300' = 600' (182m)


1-1/2" (38mm)

40' (12m)

1 x 350' = 350' (106m)


2" (51mm)

40' (12m)

1 x 200' = 200' (61m)

Super Bundle Information

Super bundles are available through phone orders +1(800) 689-2098

Super BundleSizes

  • 3/8" = 28,800' (8780m)
  • 5/8" = 16,000 (4878m)
  • 7/8" = 8,400' (2561m)
  • 1-1/8" = 4,800' (1463m)
  • 1-1/2" = 2,800' (854m)
  • 2" = 1,600' (488m)

Product SKU List

These are the SKU numbers to give if you plan to buy over the phone. To see pricing changes (if any), click on the "drop down" arrow in the Add to Cart section above.



3/8" x 200'


3/8" x 3600'


5/8" x 100'


5/8" x 2000'


7/8" x 100'


7/8" x 1050'


1-1/8" x 75'


1-1/8" x 600'


1-1/2" x 40'


1-1/2" x 350'


2" x 25'


2" x 200'



  • Keeps new crackfill liquid from running down into the crack

  • Minimizes new crackfill waste

  • Expands and contracts with pavement cracks

  • Available is various diameters from 3/8" to 2"

  • Available in lengths from 100' to 350'


Physical Properties



ASTM Test Method

Density (nominal)

1.7 pcf

D 1622



C 1253

Compression Recovery

> 90

D 5249

Tensile Strength

PSI 25 psi

D 1623

Temperature Range

-60°F to +500° F

D 5249

Auto Ignition

700° - 800° F


Water Absorption

≤ 0.107 g/cm³ C

1016 – Proc. B

Air Flow


D 3574


Technical Data Sheet:
Shipping Weight
Weight: 1 lb
Shipping Dimensions
Dimensions: 12 in × 12 in × 6 in