Slack wax is petroleum product; the raw material of paraffin wax, Slack wax is a mixture of oil and wax in yellow or brown color, processed by pressing to decrease the oil content and discoloring by special powders after heating to produce paraffin wax.

Slack waxes, have an oil content of from 5 to 30%, depending on the product. They can be productively employed in many industrial processes as they are; or they can be mixed, blended, or further refined. 

The melting points of slack wax varies from 105°F to 150°F. 

Some examples of applications for slack waxes: in wax emulsions, as binders and water-proofing in artificial woods; in matches; in jar candles; in rust-protection products; in industrial lubricants; in arena-footing; in soil or turf protection; and in fireplace products.