CRL B0CBR78 Black 7/8" Open Cell Backer Rod - 900 ft Roll

C.R. Laurence B0CBR78 Black 7/8" Open Cell Backer Rod - 900 Foot Roll is an essential component for ensuring optimal sealant performance in construction and repair applications. This open cell polyurethane foam rod is designed without a skin, eliminating the risk of outgassing and potential sealant failures. Its soft and compressible nature allows it to adapt easily to dynamic joint movements, making it ideal for use in various joint applications, particularly where damage has occurred. With a diameter of 7/8 inches and a generous roll length of 900 feet, this backer rod is suitable for both vertical and horizontal wall joints, although it should not be used in horizontal traffic surfaces. It functions as a bond breaker, controlling the depth of the sealant and ensuring a proper adhesion profile, which is crucial for prolonging the service life of high-performance sealants such as silicones and urethanes. The black color effectively disguises the backer rod within joints, providing a clean and professional finish. For best results, it is advised to install the rod at the depth recommended by the sealant manufacturer, allowing for the optimal "hourglass" shape of the sealant bead. C.R. Laurence's commitment to quality ensures that this backer rod meets the demands of building professionals and knowledgeable homeowners alike.

7/8" Open Cell Backer Rod - 900 Foot Roll

• Controls Sealant Depth and Functions as an Effective Bond Breaker
• Compatible with All Cold-Applied and Hot-Pour Sealants
• Soft Material Allows for Easy Compression During Installation

CRL Open Cell Backer Rod is a soft, round, and highly compressible polyurethane foam designed to back cold-applied sealant joints, or hot-pour sealants. Its open-cell structure allows it to flex and adapt to irregular or damaged joints without being affected by dynamic joint movement or stress.

CRL Open Cell Backer Rod is available for purchase in the following diameters – 5/8" to 2" (16 to 51 mm).

• New Joints: Clean thoroughly to remove form-release agents, curing compounds, or debris. Ensure the joint is clean and dry before applying sealant.
• Repairing Old Joints: Remove all old sealant or filler. Use wire brushing and air blasting for effective cleaning. If using an air compressor, ensure it has moisture and oil traps.

1. Prepare the surface by following the Joint Preparation directions.
2. Measure and Select: Choose the correct backer rod size based on the joint width.
3. Set Depth: Install the backer rod at the depth recommended by the sealant manufacturer, ensuring the sealant forms an "hourglass" shape.
4. Use the Right Tools: Install with a blunt tool or roller. The Cat. No. T607CU605 or Cat. No. SBRR for smooth installation.

Resources

• Safety Data Sheets B0CBR78.pdf
• Specifications 0cbr.pdf