When using a magnesium bull float, sealing the concrete surface is less likely if you:

When using a magnesium bull float, sealing the concrete surface is less likely if you:

• A. Tilt the head up
• B. control the tilt of the head to keep blade as flat as possible
• C. Move quickly
• D. Apply extra pressure

Answer: (B)

With a magnesium bull float, how you move and angle the blade controls how much cement paste is pressed to the very surface. Sealing the surface means closing the capillaries by pushing paste into the top layer, which creates a denser, smoother finish. Keeping the blade as flat as possible by precisely controlling the tilt limits how much paste and fine material are moved to the surface. This minimal action reduces the tendency to seal early. Tilting the head up, moving too quickly, or applying extra pressure all increase the amount of material brought to the surface and promote sealing, so they’re more likely to create a sealed finish sooner. Therefore, maintaining a flat blade is the best way to keep sealing less likely until you’re ready for final finishing steps.

With a magnesium bull float, how you move and angle the blade controls how much cement paste is pressed to the very surface. Sealing the surface means closing the capillaries by pushing paste into the top layer, which creates a denser, smoother finish. Keeping the blade as flat as possible by precisely controlling the tilt limits how much paste and fine material are moved to the surface. This minimal action reduces the tendency to seal early. Tilting the head up, moving too quickly, or applying extra pressure all increase the amount of material brought to the surface and promote sealing, so they’re more likely to create a sealed finish sooner. Therefore, maintaining a flat blade is the best way to keep sealing less likely until you’re ready for final finishing steps.