Heavy slack wax has higher melting and congealing point , this grade has about 15% oil contentIt is product of petroleum refining, in last years it considered as waste of the refineries and they paid to get rid of this product but now it is so useful that most of the refineries slack wax is booked and purchased some month before producing, Packing is drum in summer time and can be polyamide bags during cold seasons to prevent any deformation and leakage during delivery.
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