
CRL
CRL
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CRL Closed Cell Backer Rod (SKU: EF14C) is a round, flexible polyethylene foam backer rod with a sealed exterior skin. Designed for expansion and control joints, it controls sealant depth, promotes the preferred "hourglass" sealant profile, and prevents excessive sealant use. Its non-bonding surface lets elastomeric and other cold-applied sealants move and flex, reducing stress at adhesion points and improving long-term joint performance.
CRL Closed Cell Backer Rod is available in diameters from 1/4" to 2" (7 to 50 mm), ideal for joint sealing in curtain walls, precast panels, parking decks, door and window frames, coping, floor and deck joints, horizontal traffic joints, and building rehab projects.
Key benefits:
Temperature limits:
-45°F to 160°F (-43°C to 71°C)
Size selection:
Select a backer rod approximately 25–50% larger than the joint width to ensure a tight, compressive fit and effective bond-breaking action.
Storage:
Store in a well-ventilated area out of direct sunlight. Keep away from heat sources and open flames.
Joint preparation:
Installation instructions:
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