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Home/The Journal/Microcement Walls, Plasterboard, Plaster, Tiles and Sealing
26 October 2026

Microcement Walls, Plasterboard, Plaster, Tiles and Sealing

Microcement walls on plasterboard, plaster and tiles, a grey concrete effect wall with a mottled texture

Microcement walls give you one continuous surface with the soft, cloudy look of concrete, but without the weight or thickness. Because it goes on in thin coats, it can cover plasterboard, plaster and sound tiles. This guide covers which walls suit it, how it is prepared and finished, and when a lime plaster might be the better choice.

Which walls suit microcement

  • Bathroom and shower walls, laid over a proper waterproofing layer.
  • Feature walls in living rooms, hallways and bedrooms where you want a calm concrete look.
  • Kitchen walls and splashbacks, when sealed for grease and cleaning.
  • Commercial walls in shops, bars and offices that want a seamless industrial finish.

Preparing the wall

Microcement shows what is under it, so the wall must be sound, dry and flat.

  • Plasterboard: joints taped and filled, screw heads set and filled, and the whole board primed.
  • Plaster: cracks repaired, loose patches cut out, and the surface primed.
  • Tiles: firmly bonded, degreased, keyed and primed, with grout lines filled flush. See microcement over tiles.
  • Mixed surfaces: where two materials meet, a reinforcing mesh over the join helps stop a crack line.

The coats

A wall system usually runs primer, one or two base coats, then finishing coats, then sealer. The trowel marks in the final coats create the movement that makes microcement look like stone or concrete. Smooth, almost flat finishes and more clouded, textured ones both come from how those last coats are laid.

Sealing a microcement wall

Sealer protects the surface from water, stains and fingerprints. Walls that get touched or splashed need more coats than a decorative wall that is rarely touched. Matt, satin and gloss sealers change the final look, so test on a sample first.

Microcement walls or lime plaster?

Microcement Lime plaster
Look Concrete, industrial Stone, marble, soft mineral
Breathability Low once sealed High, suits old solid walls
Wet areas Yes, over waterproofing Depends on product and sealing
Feel Hard, even Cool, with depth from layers

For a concrete look in lime, see Beton Stucco. For solid walls in older houses that need to breathe, a lime finish such as Marmorino is often the safer choice.

Questions

Can microcement go straight onto plasterboard?

Yes, once joints are taped and filled and the board is primed with a primer the system approves.

Will microcement crack on a wall?

Not if the wall underneath is stable and joints between materials are reinforced. Most cracks come from movement in the wall behind it. See microcement problems.

Can you change the colour later?

You can lay new coats over the old once it is cleaned and primed, but it is a full refinish, not a quick repaint.

Do you install microcement walls?

Yes. See microcement installation for how we work and the areas we cover.

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