Dry blasting requires substantial containment/tenting to maintain airborne dust levels within legal limits. In outdoor and urban environments, such containment is not practical or cost-effective. Due to inherent dust suppression, vapor abrasive blasting operations require minimal containment.
Dry blasting can cast dry sparks charged with static electricity which can lead to explosions in the presence of flammable gases. Wet blasting does not completely eliminate sparks, but when sparks occur they are cold sparks (without static electricity), minimizing the explosive potential.
Wet blasters can operate effectively at lower PSI, removing coatings without damaging the underlying substrate. Vapor abrasive blasting is a preferred method for blasting antique, fragile surfaces and soft surfaces (including wood). In addition, the presence of lubricating water reduces heat due to friction that can warp metal surfaces.