FILL-RITE™ 420 feet (70-72"x1.5") Backer Rod Closed-Cell
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FILL-RITE™ 420 feet (70- 72"x1.5") of 1.5in diameter Backer Rod Closed-Cell - Grey

Honor Traders

Regular price $199.00 $179.99 Sale

Box of 70- 72"x1.5" backer rods totaling 420 feet 

Closed-Cell Polyethylene Foam
Meets SATM C1330 Type C
Made without CFC’s or HCFC’s

Backer Rod Closed-Cell is a resilient, polyethylene backer rod used as a backup material for construction joints and applications that require sealants. It performs as a depth control for most known cold-applied sealants. Sealants will not adhere to it; no bond breaker is required.

Backer Rod is a round, black, resilient, extruded closed-cell polyethylene backer rod with a water-resistant outer skin. It is compatible with most known cold-applied sealants such as urethane, silicone, acrylic, butyl, polysulfides, latex, and chinking sealants.


  • Expansion joints
  • Highway joints
  • Glazing
  • Log home chinking
  • Parking Decks



Backer Rod Closed-Cells should be installed with a roller or blunt, flat-sided tool. Please follow sealant manufacturer specifications for recommended sealant width and depth ratio. For best results, do not puncture, fold or overly stretch the product. The product is made with a water-resistant outer skin, therefore where moisture resistance is important, care should be taken not to puncture this outer surface skin.


Backer Rod is chemically inert and will resist gasoline, oil, and most solvents. The product will not stain or adhere to sealants.

Density:  1.3-1.9 lbs/ft3

Water Absorption:  less than 0.5% by volume

< 0.03 grams/cc

Temperature range:  -90ÆF to 190ÆF

Compression Recovery:  > 90%

Compression Deflection:  5 psi

Tensile Strength:  > 29 psi

Meets standards ASTM D5249 type 3 and ASTM C1330 type C