Grit blasting is still recognised as the best possible form of surface preparation as it both cleans and raises a surface profile, providing an excellent surface profile for new protective coatings to adhere to.
Grit blasting is still often referred to as sand blasting, however this is incorrect as it is illegal in the UK to use sand for blasting purposes due to the exposure to free silica if sand is used.
Conventional dry grit blasting makes use of either expendable or recyclable blast media. Typical expendable grit blast media as used in site applications would be copper slag, garnet or crushed glass.
The type of media used when grit blasting can be varied depending on the substrate being grit blasted and the surface profile required.