MBW ScreeDemon WS500 Concrete Power Screed


Manufacturer: MBW


The MBW ScreeDemon WS500 Concrete Power Screed with a Honda Engine. Please read on for additional benefits of this unit vs competitors, not too mention is is made in the USA.

When MBW develops a new product, we look for deficiencies in products already in the marketplace. Portable wet screeds suffered 4 serious shortcomings (see below):

We have decided to minimize what MBW equipment we stock & sell due to lack of support on warranty issues. Please consider one of our other 3 mfgs in Wyco, Multiquip & Wacker.

Basic Specs:

  • Honda GX35 engine
  • 29 lbs (power unit only)
  • additional details in below brochure
  • 18-24′ bars require two power units
  • bar lengths available in 2′ increments from 4′ – 20′ and also a 24′ length

MBW Screed Demon Brochure

Made in USA logo - smaller


Wet screeds were prone to high maintenance, especially in drive mechanisms between the engine and exciter. TheScreeDemon employs a simple, durable, low cost rubber isolator to drive the eccentric.


Most screed and screed bar combinations produce irregular vibration along the length of the screed bar. Not only is the concrete exposed to highly variable levels of vibration but cream levels vary from spot to spot along the screed bar. The back-to-back triangular construction of the ScreeDemon bar is extremely rigid and minimizes variability in the transmission of vibration.

Most screeds bolt to their screed bars. Hardware threads are compromised by the concrete and assembling or removing the screed becomes such a problem that crews often don’t disassemble for cleaning or transport. The ScreeDemon simply clamps to the specially designed bar. No holes to weaken the screed bar. No threads to complicate assembly/disassembly. The ScreeDemon goes together and comes apart in seconds.


All wet screeds tested by MBW exposed operators to excessive hand/arm vibration. The ScreeDemon’s patent pending mount retention method enables use of low durometer isolators without loss of operator control. Hand/arm vibration is 50 to 90% lower than competitive screeds.

US & International Patents