Slack wax is a semi-refined petroleum product obtained during the production of base oils.
It contains varying amounts of oil (typically 5–35%) and has a soft, waxy texture.
Slack wax is used as a raw material in the production of paraffin wax and microcrystalline wax.
It is also applied in matches, candles, polishes, and rust-preventive products.
In the rubber and tire industry, it acts as a processing aid and softener.
Some grades are used in board sizing and waterproofing applications.
Slack wax is classified into light and heavy grades depending on melting point and oil content.
It is typically packed in slabs, blocks, or bulk, wrapped in plastic or bags for transport.
