Reflectix Inc CF50550 Foam Sill Sealer 5.5x50 Ft White

Product Description

The REFLECTIX INC CF50550 is a ribbed polyethylene foam sill sealer designed to reduce air leakage at the joint between a foundation wall and the sill plate. Sold as a 5.5-inch-wide, 50-foot roll, it installs between the mudsill and the top of the foundation wall during new construction or sill plate replacement. The closed-cell ribbed foam is mildew resistant and water resistant, which also helps protect the sill plate from moisture-related rot over time. Framers, carpenters, and general contractors typically install this material as part of the building envelope air-sealing scope.

This sill sealer is suited for residential and light commercial wood-frame construction where the mudsill bears directly on a concrete or masonry foundation. It compresses under the weight and fastening of the sill plate to conform to minor surface irregularities, limiting infiltration of outside air, insects, and moisture vapor. The white color aids visual inspection during framing. Each roll covers 50 linear feet at 5.5 inches wide, making it a straightforward match for standard dimensional lumber sill plates.

Key Features

• Ribbed polyethylene foam construction compresses to fill gaps between sill plate and foundation
• Reduces air leakage at the mudsill-to-foundation interface
• Mildew resistant and water resistant formulation helps prevent sill plate rot
• 5.5-inch width fits standard sill plate lumber dimensions
• 50-foot roll format for efficient layout during framing
• White color for easy visual inspection during installation

Compatibility

Designed as an OEM-style replacement and new-construction sill sealer for wood-frame residential and light commercial structures where a dimensional lumber sill plate is anchored to a concrete or masonry foundation wall.

Installation Notes

Installation is performed by framers or carpenters during the mudsill-setting stage of construction. Unroll the foam across the top of the foundation wall before setting and fastening the sill plate. No adhesive is typically required, as the sill plate anchoring hardware holds the sealer in place. Follow applicable building codes for air-sealing continuity at the foundation-to-wall interface.

Technical Specifications

• Width: 5.5 inches
• Length: 50 feet
• Color: White
• Material: Ribbed polyethylene foam
• Weight: 15 pounds
• Unit of Measure: Each
• Package Quantity: 24

Standard Information

• Brand: REFLECTIX INC
• Manufacturer Part Number: CF50550