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Open Cell Backing Rod - RoundVendor:
For sealing expansion joints, precast panels, window glazing, and bridge construction, Open Cell Backing Rod - Round acts as a critical bond breaker to prevent three-sided sealant adhesion. Its open-cell structure accelerates sealant curing by allowing the joint to breathe and cure from both...- From $138.36
- From $138.36
- Unit price
- per
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Open Cell Backing Rod - SquareVendor:
Open Cell Backing Rod – Square is a square-profile, compressible foam backing for rectangular construction and expansion joints. It sits behind a compatible sealant bead to control its thickness and prevent the sealant adhering to the back of the joint, allowing it to move...
- From $3.06
- From $3.06
- Unit price
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Adheseal Backing Rod Closed Cell - RoundVendor:
Adheseal Closed Cell Backing Rod is a round, compressible polyethylene foam used behind silicone, polyurethane, hybrid and acrylic sealants. It controls the depth of a sealant bead and prevents adhesion to the base of a joint, allowing the sealant to flex between the two...
- From $12.30
- From $12.30
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Biyseal Bitumen Impregnated FoamVendor:
Biyseal Bitumen Impregnated Foam is a preformed, compressible polyurethane foam strip for sealing construction joints, metal cladding and roofing details against draughts, dust and moisture. Instead of relying on an adhesive bead, the bitumen-impregnated foam seals by pressing outward against the sides of the...
- From $134.19
- From $134.19
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Biyseal Acrylic Impregnated FoamVendor:
For sealing expansion joints, roof cladding, and window or door perimeters against weather, Biyseal Acrylic Impregnated Foam provides a highly compressible barrier that adapts to continuous joint movement. This high-density polyurethane foam is impregnated with an acrylic solution, allowing it to expand and contract...
- $136.58
- $136.58
- Unit price
- per
Frequently Asked Questions
Why use backing rod in a sealant joint?
Backing rod controls the sealant depth and helps create the correct hourglass joint profile. It also prevents three-sided adhesion, allowing the sealant to move as designed. Select the rod size and material for the joint width, depth, exposure and specified sealant system.
Which backing rod type should I choose?
Open-cell, closed-cell and fire-rated backing rods serve different joint requirements. Closed-cell foam limits moisture entry, open-cell foam may suit particular joint designs, and fire-rated products are used only where the tested system requires them.
What is the difference between backing rod and gap filler rod?
Backing rod and gap filler rod are the same product. Both control sealant depth and prevent three-sided adhesion. The term gap filler rod is common in trade use. Select the rod diameter to suit the joint width.
Can I use backing rod for caulking?
Yes. Backing rod is used behind caulking to control the sealant profile and depth. It suits most caulking applications where a hourglass joint profile is needed. Check the rod size against the joint width.
What is caulking foam?
Caulking foam is a trade term for foam backing rod used behind caulking. It controls sealant depth and prevents three-sided adhesion. Adheseal stocks open-cell and closed-cell backing rod for caulking work.
How do I choose the right backing rod size?
Match the rod diameter to the joint width. The rod should compress into the joint and stay in place without gaps. Check the product diameter range against the joint dimensions before use.