Last updated: February 12, 2019

What Does Mastic Mean?

Mastic is a generic term used to describe a wide range of pasty materials that are used as protective coatings on the surfaces of metals to prevent corrosion. In addition to corrosion resistance, these materials provide abrasion and scratch resistance.


Corrosionpedia Explains Mastic

The term mastic generally includes

  • Thin metallic coverings
  • Organic coverings such as polymeric material and paint
  • Optical film coverings
  • Etched or printed surface coverings

Surface protective mastic coatings are widely used for waterproofing underground metallic surfaces. In particular, a combination of coal tar and vinyl resin is used on equipment or surfaces that process crude oil and other petroleum products. Such a combination is mastic in nature and provides desirable resistance properties.


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