Thermwell B2WT Mortite Caulking Cord 90 Foot Woodtone

Product Description

The THERMWELL B2WT is a rope-style caulking cord designed for sealing gaps and air leaks around windows, doors, and other building envelope penetrations. Sold in a 19-ounce roll that spans 90 feet, this flexible Mortite compound presses into place without tools and conforms to irregular surfaces including wood, metal, masonry, and most painted finishes. The woodtone color blends with stained or natural wood frames, making it a practical choice for installations where aesthetics matter. It is a go-to air-sealing product for weatherization contractors, insulation crews, and maintenance technicians addressing seasonal heat loss.

This caulking cord is suited for residential and light commercial weatherization work. Typical applications include sealing the perimeter of single- and double-hung windows, sliding doors, and storm window frames where a paintable or removable seal is preferred over permanent caulk. The 90-foot length makes it efficient for whole-house weatherstrip runs. It is packaged 12 rolls per case, supporting bulk use on multi-unit or multi-room projects.

Key Features

• 90-foot roll provides ample coverage for large or multi-opening jobs
• 19-ounce rope-style compound conforms to irregular and rough surfaces
• Woodtone color blends with natural and stained wood window and door frames
• No tools required for application — press-fit installation
• Removable and reusable seasonal sealing option
• Packaged 12 rolls per case for bulk job-site use

Compatibility

Designed as a general-purpose rope caulk weatherstrip for use on wood, metal, and masonry window and door frames in residential and light commercial construction.

Installation Notes

No special trade license is required for installation, but weatherization technicians and general contractors are the typical installers. Clean and dry the application surface before pressing the cord into gaps or seams to ensure proper adhesion. The cord is intended to be removable at the end of the heating season and should not be applied over flexible or moving joints where permanent sealant is required. Follow local building codes regarding air barrier continuity when used as part of a larger weatherization scope.