Speciality is an approved Thermaflex Torch-On applicator. Thermaflex is a torch-on waterproofing product made in Pretoria for South African weather conditions. All torch-on systems are undertaken above ground and have a 10-year guarantee, subject to a service every 2 years.Thermaflex's Special Polyester 4 mm Roofing is a high performance, UV stable, polymer modified bitumen waterproofing membrane. This dual reinforced product comprises of a high strength polyester core and a top layer of reinforced glass tissue. Thermaflex Special Polyester Roofing is compatible with most existing materials, and systems.