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FILL-RITE 4" Diameter Grey Backer Rod Closed Cell - Individual

FILL-RITE 4" Diameter Grey Backer Rod Closed Cell - Individual

Regular price $29.99 USD
Regular price Sale price $29.99 USD
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Always select the right backer rod for commercial applications. When you purchase a Fill-Rite 4” diameter grey backer rod closed cell, you receive a resilient product. Perfect as backup material for construction joints, it performs as depth control for most cold-applied sealants. Use the grey 4-inch backer rods for horizontal and vertical applications. For instance, you can use the rods to partially fill large cracks, gaps, and joints before applying sealant. Our Fill-Rite 4” diameter grey backer rod closed cells are sold individually and are highly versatile. Purchase your units today!

Single 4 inch Diameter Backer Rod and Craft Foam - Grey.

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

Backer Rod is a closed-cell, 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


Closed-Cell Foam Backer Rod 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.

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