Product Overview

The CRL Open Cell Backer Rod is a highly adaptable and resilient open-cell polyurethane foam designed for a variety of applications. This backer rod remains unaffected by joint movement and readily adjusts to variations. It is particularly well-suited for scenarios involving joint damage, effectively preventing sealant failures due to outgassing common with closed cell backer rods. Moreover, its discreet black color conceals the backer rod in specific joint applications. With a temperature range of -65° to 400°F (-54° to 204°C), it is the top choice for high-performance sealants like silicones and urethanes. While ideal for vertical and horizontal wall joints, it is not suitable for horizontal traffic joint surfaces such as pavement joints.

Proper selection of the CRL Open Cell Backer Rod size is crucial, as it regulates the depth of the sealant bead and acts as a bond breaker. It should be oversized (50%) to fit snugly into the joint, ensuring effective prevention of bottom-side adhesion of the sealant.

For optimal results, it is imperative to meticulously clean new joints and remove any concrete form-release agents, curing compound residue, or foreign materials. When repairing old joints, thorough removal of old sealant or filler using wire brushing and air blasting is essential. After assessing the joint size, choose the applicable backer rod and install it at the recommended depth provided by the sealant manufacturer.

Open Cell, No Skin, Non-Gassing Rod is Compatible With All Cold-Applied Sealants - Controls Depth of Sealant and Acts as a Bond Breaker - Soft, Compresses Easily

Please note that the CRL Open Cell Backer Rod is not suitable for horizontal traffic joints, should only be used in vertical wall joints, and must not be used with hot applied sealants. If you have any questions regarding sealant compatibility, we advise confirming with the sealant manufacturer.