Semi-rigid polyvinylidene fluoride (PVDF) heat-shrinkable tubing, made from radiation-modified polyvinylidene fluoride, is transparent, flame-retardant, and resistant to high temperatures, most oils, and chemicals. It also boasts wear resistance and cutting resistance. It is widely used for the protection of solder joints, terminals, and connecting cables that are subject to high temperatures, industrial fuels, solvents, and chemical reagents.