Heat hardening sealant-gel for flexible couplings

摘要: This specification discloses a means for providing barrier against the passage of fire through that portion wall aperture surrounding an electrical conduit, pipe, or like. is accomplished by placing sleeve around conduit passing wall, which central envelope anchored peripherally to more less rigid material blocking and connects end portions envelope, each extends connect with on opposite side wall. The annular region between filled intumescent gel. boot flexible capable some movement compensate thermal expansion, vibration other forces during life installation. In event heat fire, gel within intumesces, protection flames gas now occupied resistant mass formed solidification intumescible comprises sodium silicate solution, filler, hardener.