A PVC lubricant is a processing aid, typically based on wax chemistry, that is incorporated into PVC formulations at low dosage levels. Its primary function is to reduce friction during melting and shaping, enabling smoother flow and more controlled processing behavior.

Among various lubricant types, oxidized polyethylene wax is widely used due to its balanced polarity and controlled oxidation level, which allow it to function effectively within PVC systems without compromising mechanical properties or appearance.

Unlike conventional oils or greases, PVC lubricants are specifically designed to withstand the high temperatures and shear forces of polymer processing while maintaining compatibility with the PVC resin matrix.

Waxes are a diverse class of organic compounds that are lipophilic, malleable solids near ambient temperatures. They include higher alkanes and lipids, typically with melting points above about 40 °C, melting to give low viscosity liquids. Waxes are insoluble in water but soluble in organic, no polar solvents. Natural waxes of different types are produced by plants and animals and occur in petroleum.