... %PTFE masking tape:Easy to use,Ideal material for sealing.Professional teflon tape mainly for naturalgas,water,petroleum oils,liquids and air ... grainage systems.characteristics:Insulation,acid-resistance and corrosion resistance,using in oxidizing agent for a long term. Product Distription: 1, seal water ... you,if you have any question,pls contact us,thanks for your attention.◊◊◊