- New
5850 is a Heng's butyl sealing tape designed for sealing around windows, doors, vents and joints on compatible RV and outdoor applications. This off-white, non-hardening butyl tape measures 3/16" thick by 1" wide and comes in a 20-foot roll. Its pliable, tacky material adheres to metal, wood, concrete, glass, plastics and other porous surfaces, making it suitable for sealing and bonding applications where a flexible butyl seal is required.