Black Swan’s Tuffy String is a round, cord form, flexible gasketing material made from pure 100% PTFE. It is used for valve stem packing and flange gasketing applications. Black Swan Tuffy String is highly conformable, will not seize, has excellent chemical resistance and operates from temperatures from -400° F to +600° F. Not intended for food contact applications.
- Clean area completely where Black Swan Tuffy String is to be applied.
- Wind Black Swan Tuffy String around stems, bolts, fittings, etc. Apply enough material to make a positive seal.