Skip to product information
1 of 6


FILL-RITE 1.5-inch Backer Rod Closed-Cell (70 Units of 1.5" x 72") 420 Feet

FILL-RITE 1.5-inch Backer Rod Closed-Cell (70 Units of 1.5" x 72") 420 Feet

Regular price $179.99 USD
Regular price Sale price $179.99 USD
Sale Sold out

Do you need a grey FILL-RITE 1.5-inch closed-cell backer rod? If so, we have what you’re looking for in stock now! This concrete backer rod is available in 70 units of 1.5" x 72", making it the perfect material to cushion construction joints. Learn more about our waterproof backer rod by calling or reaching out online! 

Box of 70 - 72"x 1.5" backer rods totaling 420 feet.

Closed-Cell Polyethylene Foam
Meets SATM C1330 Type C
Made without CFCs or HCFCs

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.

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


  • Expansion joints
  • Highway joints
  • Curtain wall joints
  • Pavement joints and repairs
  • Partitions
  • Window and door applications
  • Precast concrete coping
  • 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.



Density: 1.3-1.9 lbs/ft3

Water Absorption: less than 0.5% by volume

< 0.03 grams/cc

Temperature range: -90F to 190F

Compression Recovery: > 90%

Compression Deflection: 5 psi

Tensile Strength: > 29 psi

Meets standards ASTM D5249 type 3 and ASTM C1330 type C

View full details