Perma Butyl Tape SF 50 is used for covering all cracks, construction joints, bends and corners and joints of non homogenous materials before application of waterproof membranes such as Perma Guard or Perma Eazee Coat.Perma Butyl Tape SF 50 is used for joint sealing of the metallic and non metallic roofing such as aluminum, zinc asbestos sheeting.Perma Butyl Tape SF 50 can be used for sealing all joints in timber framed houses.It is used for sealing all the corner joints and the joints between the horizontal and vertical RCC surfaces of the sunken slabs of toilets and bathrooms after waterproofing. It is also used for covering of all cutouts and pipe joints in the walls.This tape is used for covering the insulated air conditioning ducts.