Thermwell B2 90-Ft Gray Mortite Weatherstrip Caulking Cord – 2 Pack

Overview

Thermwell B2 gray mortite weatherstrip caulking cord is a flexible foam seal designed for windows and doors. The gray cord comes in a long 90 ft length with a 1/4 inch diameter, giving you plenty of material to tackle multiple openings.

Why mortite weatherstrip works

Made from a dense closed-cell foam blend with neoprene, this cord resists moisture and compression while staying pliable. The result is a weather barrier that is durable without adding bulk to frames.

• Long length and easy to customize: two 90 ft cords per pack, easily cut to fit with scissors or a blade.
• Weatherproof performance: oil resistance, flame retardant properties, corrosion resistance, and dustproofing capabilities.
• Versatile applications: suitable for windows, doors, drawers, cabinets, garages, sliding doors, and DIY projects.
• Simple installation with DIY-friendly handling and reliable Thermwell support.

Practical uses arise in real homes and spaces. If you feel a chilly draft along a sill, you can trim and press the cord into the gap for a neater seal. In a workshop or garage, it can help seal around tool chests or shelving.

Installation tips

• Clean the surface before applying and trim the cord for a precise fit.
• Press firmly into the gap to settle the foam seal; a light finish trim may be all that is needed.

Two packs provide value for larger remodeling projects or multiple rooms, and Thermwell supports quality with customer service to help with questions or guidance.