Overview
The OX Pro Magnesium Float is a 400mm concrete finishing tool for smoothing and leveling fresh concrete. The cast magnesium blade is light, resists corrosion and stays flat under heavy use, while rounded corners and bevelled ends let you work close to edges without gouging the surface. It suits floors, paths, driveways and general slab finishing.
Magnesium floats are the standard tool for the pass that comes after the screed is struck off. The magnesium reacts with the fresh surface to close it over and bring the fines to the top, leaving a tight, even texture that is ready for troweling or sealing. On a warm day it gets the surface flat without pulling it apart.
Key Features
- Cast magnesium blade is lightweight and resists corrosion and warping
- 400mm blade length covers large areas in fewer passes
- Rounded corners and bevelled ends reduce gouging on edges
- Palm lift OX Grip handle reduces fatigue on long passes
- Improves strike off performance and closes the concrete surface
- Balanced design for a consistent finish across the slab
Specifications
- Blade material: cast magnesium
- Blade length: 400mm / 16in
- Blade width: approximately 80mm
- Blade shape: rounded corners, bevelled ends
- Handle: palm lift OX Grip
Applications
- Smoothing and leveling fresh concrete
- Closing the surface after strike off
- Finishing floors, paths and driveways
- Preparing concrete for troweling or sealing
- Trade and DIY slab work
What You Need to Complete the Job
Use the float on an OX Pro telescopic bullfloat handle for standing reach on big pours, and finish the edges with a stainless steel groover. See the Concreting Tools range for the full finishing kit. Float the slab while the surface is still plastic, then let it firm up before the trowel pass.
Frequently Asked Questions
What is a magnesium float used for?
A magnesium float smooths and closes the surface of fresh concrete after the screed is struck off. It brings the fines to the top and flattens small irregularities, leaving a texture that is ready for troweling or sealing. The magnesium blade is preferred for this pass because it does not drag the surface the way a steel float can.
Is a 400mm float a good size?
Yes. The 400mm blade is the everyday trade size, big enough to cover a slab efficiently and small enough to control on edges and around obstacles. A larger 500mm float covers more ground but is heavier to control; the 400mm is the sensible default for most work.
How do I keep the blade in good condition?
Wash the float clean at the end of each pour and dry it before storage. Magnesium resists corrosion and warping, but leaving wet concrete on the blade dulls the working face over time. Store it flat so the blade does not pick up a twist.




