A few years ago we asked ourselves the same question. As a matter of fact, we tested several flux scalers, also called needle scalers, on concrete. We thought we were on to something.
After wasting a lot of money and time, we were overwhelmingly disappointed because they were slow and took a lot of air to operate. Not good for decorative concrete installations!
A needle scaler has large “needles” that chip rust from steel and flux from a weld.
A Shark, on the other hand, has small specifically hardened teeth called impactors that eat away at the concrete. The teeth leave a fine textured kerf. The teeth are arranged and reconfigurable to your cutting needs. The mouth of the Shark is shaped to contain the impactor array in cutting formation.
There are several other attributes that set the Shark apart; like strategically placed No-Mar plastic cushions to reduce the chances of marring the finished surface, a specifically heat treated and sized piston recoil spring, optimized air/power displacement, and an integral nozzle that blows cutting debris out of the openings of the template. All characteristics that make the Shark different from a scaler and perfect for decorative concrete engraving!
The Shark, Barracuda and Wasp – the KaleidoCrete family – are tools we’ve developed specifically for decorative concrete. They are made to work within the confines of a template to produce amazing images.