1.25” FILL-RITE™ Pre-Caulking Filler Rope Backer Rod Roll
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foam backer rod 1.25 inch

Bulk FILL-RITE Pre-Caulking Filler Rope Backer Rod Roll Bulk. Sizes: 1.25", 1", 3/4", 5/8", 1/2", 1/4", 3/8" Free Shipping!


Regular price $159.99 $129.99 Sale

FILL-RITE Pre-Caulking Filler Rope Backer Rod Roll

The FILL-RITE Pre-Caulking Filler Rope Backer Rod Roll is made of closed-cell, resilient polyethylene. It's 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.


Our Pre-Caulking Filler Rope Backer Rod Roll is a round, 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
  • Pool decks
  • Curtain walls
  • Coping joints
  • Isolation joints
  • Temporary joint seal


Pre-Caulking Filler Rope Backer Rod Rolls 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.

Joint or opening must be free of all contaminants, loose materials, dry and free of frost. Select correct rod size for joint width. With a blunt instrument or roller, seat Caulk Backer Rod to depth recommended by sealant manufacturer.

Pre-Caulking Filler Rope Backer Rod Rolls are chemically inert and will resist gasoline, oil, and most solvents. 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: -90"F to 190"F
Compression Recovery: > 90%
Compression Deflection: 5 psi
Tensile Strength: > 29 psi
Meets standards ASTM D5249 type 3 and ASTM C1330 type C