Thermwell R338WH White Foam Weatherstrip Tape 10 Ft

Product Description

The THERMWELL R338WH is a self-adhesive, high-density white foam weatherstrip tape designed to seal gaps and prevent air infiltration around windows, doors, and HVAC equipment. The tape measures 3/8 inches wide by 3/16 inches thick and comes in a 10-foot length per roll. Its compressible foam construction conforms to irregular surfaces, creating a consistent seal against drafts, moisture, and noise. HVAC technicians, appliance service pros, and general contractors reach for this tape when a fast, reliable compression seal is needed without additional fasteners or adhesives.

This tape is suited for a wide range of residential and light commercial applications. Common uses include sealing gaps around window and door frames, creating a perimeter seal around window-mounted air conditioning units, replacing or supplementing refrigerator and freezer door gaskets, and dampening rattles, squeaks, and vibrations on automotive applications including cars and trucks. The self-stick backing allows for quick, one-person installation on most clean, dry surfaces.

Key Features

• Self-stick backing for tool-free, one-person installation
• High-density foam compresses to fill irregular or uneven gaps
• 3/8 inches wide by 3/16 inches thick profile fits standard door and window channels
• 10-foot roll length per unit covers most single-opening installations
• White finish suits painted window frames and appliance trim
• Multi-application use: windows, doors, AC units, refrigerator gaskets, and automotive vibration damping

Compatibility

Designed as a general-purpose compression seal for residential windows, doors, window air conditioning units, refrigerator and freezer door perimeters, and automotive panels where gap filling or vibration isolation is required.

Installation Notes

Clean and dry the mounting surface thoroughly before applying the tape to ensure proper adhesion. Power down or unplug any appliance before applying tape around door gasket areas. For HVAC or refrigeration applications, confirm the gap dimension is within the compressible range of the foam before cutting and applying. Cut with scissors or a utility knife to length; avoid stretching the tape during application, as this reduces long-term adhesion.