About This Product
Description
Backer Rod (also known as Backing Rod) is a polyethylene-based foam rod available in open-cell, closed-cell, and bi-cellular forms. It is commonly supplied in grey or white and is designed to be inserted into joints prior to sealant application.
Its primary function is to control the depth of sealant application, improve adhesion, and optimize joint performance by ensuring the sealant forms a proper two-point bond. It is compatible with most joint sealants and is widely used across construction, civil infrastructure, and facade work.
Key Characteristics
Features
- Available in open-cell, closed-cell, and bi-cellular polyethylene foam — suitable for a wide range of joint types and sealant systems
- Controls sealant depth and promotes correct hourglass shape for optimum joint movement performance
- Prevents three-sided adhesion, which significantly improves sealant flexibility and longevity
- Lightweight, compressible, and easy to install by hand — no special tools required
- Compatible with most silicone, polyurethane, and polysulfide sealants
- Available in a range of diameters to suit various joint widths
