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STI PMB-21 Propane Burnisher

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  • STI PMB-21 Propane Burnisher

 Product Description

The STI propane burnisher was developed to ensure maximum speed while delivering superior results in substrate polishing. The powerful Kawasaki 18 HP 603cc engine has lower torque and is controlled through a variable speed drive. The EnviroGard emissions monitoring system and catalytic mufflers lower CO, HC, and NOx emissions. Higher RPM burnishing speeds deliver superior “wet look” shine.

The PMB-21 features low profile deck with bumper skirting, and tilt back deck design for quick pad changes. Comes with a standard water tank for wet operation only. Available in 240V or 480V/380V. Uses the MG2 Diamond System, STI CASH Dots Diamonds, & SPIN-1 Diamond Pads.


  • Motor: Kawasaki 18 HP 603cc engine
  • Burnishing Width: 21"/530 mm
  • Performance (per hr.): 1,000 SF/93 m2
  • Sound Level: 7 DBA
  • Pad Speed: 1,800-3,500 RPM
  • Length: 58"L x 28"W x 51"H (147 cm x 71cm x 129.5cm)
  • Weight: 290 lbs (131.5 kg)
  • Pad Size: 21" (530 mm)

 Warranty Information

Prep/Master® Warranty

Substrate Technology guarantees that its machines and products are without manufacturing defects. The warranty period on machines is one (1) year from the date of sale and the variable speed drive carries a two (2) year warranty from the date of sale. Substrate Technology will replace any part that is defective at its own cost within the warranty period. This warranty does not cover wear items or instances of abuse or neglect.

 Other Details

Kawasaki 18 HP 603cc engine
Burnishing Width:
21" (530 mm)
Performance (per hr.):
1,000 SF (93 m2)
Sound Level:
7 db
Pad Speed:
1,800 - 3,500 RPM
58"L x 28"W x 51"H (147cm x 71cm x 129.5cm)
290 lbs | 131.5 kg
237 lbs (107.5 kg)
Pad Size:
21" (530 mm)

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