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Nomaco HBR Closed Cell Backer Rod 2" & 3" x 6' – Black Foam
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Nomaco HBR Closed Cell Backer Rod 2" & 3" x 6' – Black Foam
Nomaco HBR is a closed cell backer rod for filling concrete expansion and contraction joints before sealant application. This page lists two sizes: 2" x 6' and 3" x 6' black rods, each sold as one piece. Nomaco engineered foam materials serve commercial, residential, municipal, civil and industrial projects.
Key Features:
- Closed Cell Foam: Closed cell construction backer rod supports joint sealant application.
- Joint Filler: Used as a filler for concrete expansion and contraction joints almost anywhere concrete is used.
- Versatile Applications: Designed for commercial, residential, municipal, civil and industrial projects.
- Two Diameters: Available in 2" and 3" diameters, each 6 ft. long.
- Black Color: Black foam blends into concrete joints during installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Nomaco |
| Sell unit | 1 piece, 6 ft. length (2 in. or 3 in. diameter) |
| Product line | Nomaco engineered construction foam materials |
| Available colors | Black (3" item listed as Black; color not stated for the 2" item) |
| Available sizes | 2" x 6' and 3" x 6' |
| Material | Closed cell foam |
| Dimensions | 2 in. or 3 in. diameter x 6 ft. length |
| Intended use | Filler for concrete expansion and contraction joints; backing for joint sealants |
| Assembly | Press into clean joint before applying sealant |
Coverage & How Much You Need:
Each 6 ft. rod fills 6 linear feet of joint. Measure total joint footage and order enough rods to cover it, choosing a rod diameter roughly 25% larger than the joint width so it compresses and stays in place.
Fit and Compatibility:
Works under compatible joint sealants in concrete expansion and contraction joints. Select rod diameter to suit joint width; the 2" rod suits wider joints than typical 3/8"–1" applications, and the 3" rod fits very large joints.
Frequently Asked Questions (FAQ):
Q: What is included?
A: One 6 ft. backer rod per item ordered, in either 2" or 3" diameter depending on the variant.
Q: What does backer rod do?
A: It fills concrete expansion and contraction joints and provides backing so sealant is applied at the proper depth and shape.
Q: Which diameter should I choose?
A: Common practice is to pick a rod about 25% wider than the joint so it friction-fits; use 2" for large joints and 3" for very large joints.
Q: What projects is it for?
A: Nomaco engineered foam materials are designed for commercial, residential, municipal, civil and industrial projects.
Q: Is it open cell or closed cell?
A: This is a closed cell backer rod (HBR).
Q: How is it installed?
A: Press the rod into the cleaned joint to the required depth, then apply sealant over it.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Backer rod controls sealant depth so the joint can flex without the sealant bonding to the bottom—a three-point bonding failure you avoid with proper backing. Closed cell rod suits horizontal concrete joints; size the rod about 25% oversized for a friction fit and do not stretch it during installation. For very wide slab joints, the 3" diameter offered here is a practical choice.
Review the sealant manufacturer's instructions for joint preparation and compatibility before installing backer rod and sealant.
Order Nomaco HBR Closed Cell Backer Rod in 2" or 3" and back your concrete joint sealant the right way.
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