• 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).

Unlike closed-cell rods, it eliminates the risk of outgassing when punctured, making it ideal for high-performance sealants like silicones and urethanes.

Temperature Limits:
-60° to +500°F (-15° to +260°C)

Application:
Best used in vertical and horizontal wall joints. Not recommended for horizontal traffic surfaces such as pavement joints.

Size Selection:
When choosing a CRL Open Cell Backer Rod, it is important for proper size selection as it controls the depth of the sealant bead and acts as a bond breaker to prevent back-side adhesion. It must be oversized approximately 50% wider than the joint to ensure a tight fit.

Storage:
Store in a well-ventilated are. Do not store products in direct sunlight. Keep away from heat sources and open flames.

Joint Preparation:

• 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.

Installation Instructions:

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.

THE PRODUCT CAN COME IN DIFFERENT SHADES / TONES, BUT THIS WILL NOT AFFECT THE OVERALL PERFORMANCE OF THE PRODUCT.

Product Warning:
Not suitable for horizontal traffic joints—use only in vertical wall joints. Do not use with hot-applied sealants.