Thermwell S258/17H Felt Weather Strip 5/8x3/16 in 17 Ft

Product Description

The THERMWELL S258/17H is a multi-purpose felt weather strip designed to seal gaps around doors, windows, and other building openings. It measures 5/8 inches wide by 3/16 inches thick and comes in a 17-foot roll, giving installers enough material for most standard residential door or window applications in a single piece. The strip is made from synthetic felt engineered to resist stretching and tearing, which helps it hold a consistent seal over time. HVAC technicians, contractors, and skilled DIYers use this type of weather strip to reduce air infiltration and improve the efficiency of conditioned spaces.

This weather strip suits residential and light commercial applications where a compressible, low-profile seal is needed. Common install locations include door frames, window sashes, garage side doors, attic access panels, and crawl space entries. The 5/8-inch width fits many standard door stop and frame profiles without trimming. The 17-foot roll length covers a full exterior door perimeter with material to spare for overlap or minor waste at corners.

Key Features

• Synthetic felt construction resists stretching and tearing for long-lasting performance
• 5/8 inches wide by 3/16 inches thick fits standard door and window frame profiles
• 17-foot roll length covers a full door perimeter in one piece
• Multi-purpose design suits doors, windows, attic hatches, and similar openings
• Compressible profile creates a firm contact seal when the door or window closes

Compatibility

Designed as a general-purpose replacement or new-installation felt weather strip for standard residential and light commercial door and window frames where a 5/8-inch by 3/16-inch profile is specified.

Installation Notes

Weather strip installation requires no special tools beyond a utility knife, scissors, and a tape measure. Clean and dry the mounting surface before applying to ensure proper adhesion. Close and latch the door or window after installation to confirm the strip compresses evenly without binding the hardware. Follow local building codes for energy envelope sealing where applicable.