- New
5650 is a Heng’s gray putty sealing tape made from a heavy, flexible, non-hardening butyl material. It measures 3/16" thick x 1" wide x 20 ft long and is designed for sealing under moldings and around windows, doors and vents. It can also be used to waterproof overlapping metal or rubber roof surfaces. The pliable material can be shaped to conform to uneven surfaces and difficult areas.