CRL 1-1/8" Sof® Rod - 100 Foot Roll

• Controls sealant depth and functions as an effective bond breaker for silicone and polyurethane sealants
• Compatible with cold-applied and many hot-pour sealants; dual-cell design reduces outgassing and sealant bubbling
• Soft, extruded polyolefin foam core with a compressible outer skin allows easy compression during installation

CRL Sof® Rod is a dual-cell backer rod and advanced sealant backing material that combines open- and closed-cell performance in a single extruded polyolefin foam product. The resilient internal structure and non-absorbent outer skin minimize outgassing when the skin is ruptured, helping prevent sealant bubbling and failure. Chemically inert, Sof® Rod is compatible with virtually all known cold-applied sealants, including self-leveling types, making it a reliable choice for glazing and construction sealant applications.

CRL Sof® Rod is available in diameters from 3/8” to 2” (10 to 51 mm).

Temperature Limits:
-45° to 160°F (-43° to 71°C)

Application:
Commonly used as backer rod in glazing, curtain wall construction, partitions, parking decks, bridge construction, modular home gasketing, and log home chinking. Ideal long-tail use case: "dual-cell backer rod for exterior expansion joints and curtain wall seals."

Size Selection:
Select a Sof® Rod slightly oversized (about 25–50% wider than the joint) to ensure a tight fit; proper sizing controls sealant bead depth and prevents back-side adhesion.

Storage:
Store in a well-ventilated area out of 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:
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