Intertape 4238 polyester film provides puncture resistance, abrasion resistance and resistance to edge tear. High tensile strength, conformable backing with aggressive adhesive for a variety of heavy-duty insulating and holding applications. Very resistant to chemicals, solvents and aging and offers excellent dielectric strength and insulation resistance. - The combination of polyester film with glass filament reinforcement delivers high tensile strength, making these tapes excellent for heavy-duty banding and insulation applications.