Substrate Technology
+1 (815) 941-4800
+1 (815) 941-4600 (fax)
1384 Bungalow Rd.
Morris, Illinois, U.S.A.

What is a shot blaster and when is it a good choice for surface preparation?

A shot blaster is a machine that controls the flow or stream of fine metal beads as they are forcibly projected against a surface by mechanical acceleration. Shot blasting is the process of removing thin surface deposits by broadcasting fine metal beads at a high pressure without causing significant damage to the surface.

Common applications for shot blasting are:

  • to prepare a concrete floor for further treatment
  • to completely remove residual coatings (less than 1/16”)
  • to clean or strip rust from metal surfaces
  • to eliminate dirt, greases, and oils
  • to remove or prepare surfaces for paint line striping
  • to etch stencils or floor graphics

Is a shot blaster a good choice for surface prep?

It depends.

A shot blaster will generally produce a CSP (concrete surface profile) of a “3.” In all cases, it is emphasized that the coating manufacturer’s recommendation for surface prep be followed. If a shot blaster is recommended, then that is what should be used.

The profile is unique to this machine type and mandated by the coating’s manufacturer so a thorough bond will occur and warranty granted. In general, a shot blaster is not suited for thick coatings or adhesive removals, but is excellent to profile broom-finished or hard-troweled concrete.

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For any clarification of the above or to discuss your unique situation, please do not hesitate to contact STI or any of its authorized dealers for more help and advice. We are all here to supply you solutions that save you time and make you money.