Microcement Finishes in London Properties: Application, Durability, and Period Home Suitability

What Microcement Is

Microcement — also sold under trade names including Topciment, Pandomo, Mortex, and Beton Cire — is a composite coating material consisting of cement, fine aggregates (typically below 1mm particle size), polymers, and pigments. Applied in multiple thin layers to a total thickness of 2–3mm, it produces a seamless, hard surface with a distinctive concrete-like appearance that can be applied to walls, floors, and wet areas including showers.

It is not a paint or a thin film coating. It is a cementitious layer system that, when correctly applied and sealed, becomes a durable, water-resistant, and visually striking surface. In London's design-conscious property market — particularly in refurbished Victorian terraces, warehouse conversions, and high-spec contemporary apartments — it has become a popular choice for bathrooms, kitchens, and feature walls where the client wants the aesthetic of raw concrete without a structural concrete substrate.

The Application Process

Microcement application is a multi-stage process that requires experience and precision. A typical wall or floor application runs as follows:

1. Substrate preparation — the existing surface must be clean, stable, dry, and at the correct level of flatness. On walls, this typically means a skim-plastered finish to within 3mm in 2 metres. Floors require a correctly finished screed or existing tile surface. Any movement, cracks, or soft areas must be remediated before microcement is applied.
2. Fibreglass mesh layer — on walls particularly, a glass fibre mesh is embedded in the first microcement layer to reinforce the coating against cracking caused by substrate movement.
3. Base coats — two or three base coats of microcement are applied by trowel in thin, overlapping layers. Each coat must be fully cured (typically 12–24 hours depending on temperature) before the next is applied.
4. Colour coats — one or two finish coats in the specified colour are applied. These are worked with a steel trowel to achieve the characteristic smooth-but-textured surface.
5. Sanding — between finish coats, fine sanding with 120–220 grit paper refines the texture.
6. Sealing — two to four coats of a specialist polyurethane or epoxy sealer are applied to complete the system. Sealing is critical: unsealed microcement is porous and will stain permanently on contact with oils, wine, or other liquids.

The total process on a typical bathroom takes four to seven working days, depending on curing times between coats and the complexity of the surfaces involved.

Colour Options for Microcement

Microcement is supplied in a range of base pigments that can be mixed to achieve a wide colour spectrum, though the material's concrete nature means colours are inherently muted and earthy rather than bright or saturated. The most popular choices in London properties reflect this: warm greys, cool blue-greys, warm putty tones, sand, and mid-brown. Attempting to achieve bright or highly saturated colours in microcement is technically possible but rarely successful — the cement base inevitably desaturates the pigment.

Surface finish varies with trowel technique and the specific product system used. A highly burnished trowel finish produces a smoother, more reflective surface that reads closer to polished concrete; a more open trowel technique leaves the surface slightly more textured, closer to raw concrete. Discussing the desired finish with reference to physical samples rather than digital images is strongly recommended — microcement photographs very differently from how it reads in person.

Durability and Maintenance

When correctly applied and sealed, microcement is a durable surface. On floors, it is comparable in durability to polished concrete and will handle normal residential foot traffic without issue. It will show wear in high-traffic areas over time — hallways and kitchen floors see the seal coat degrade first. Resealing every three to five years in high-use areas maintains protection and refreshes the finish.

On walls and in wet areas (shower enclosures, bath surrounds), the sealing system is critical. A high-quality polyurethane or epoxy sealer correctly applied creates a waterproof barrier that handles prolonged water exposure. A poor-quality sealer or inadequately applied system will allow water ingress, leading to staining and, in the worst case, delamination.

Microcement surfaces should be cleaned with pH-neutral cleaners — acidic or abrasive products will attack both the colour coat and the sealer.

Is Microcement Appropriate for Period Properties?

This is the question most often asked by London clients considering microcement in a Victorian or Georgian property. The honest answer is: it depends on where and how it is used.

Microcement in a bathroom or kitchen in a Victorian terrace — spaces that have been modernised many times over a century and rarely retain original fabric — is unproblematic from a heritage perspective. The material does not affect original plasterwork in other rooms, and a contemporary bathroom in a Victorian house is a normal and expected condition.

Using microcement on structural surfaces in historically significant spaces — over original lime plaster walls in a listed building, or on original timber floors — raises different concerns. Microcement on timber floors requires the floor to be sufficiently stable and level; timber movement in older buildings can crack the cementitious layer over time. On lime plaster walls, the moisture behaviour of the two systems is incompatible — microcement is not breathable, and applying it to a wall that manages moisture through vapour exchange can cause problems.

For listed buildings, any surface treatment that is not reversible may require listed building consent. Always seek planning advice before specifying microcement in a protected property.

Finding a Qualified Microcement Applicator in London

Microcement application is a skilled trade. The number of contractors who can apply it correctly is smaller than the number who advertise the capability. Before instructing any contractor, ask to see completed projects in person, ask for the specific product system they use (and verify it against manufacturer data), and ask about their sealing specification. A contractor who cannot answer these questions in detail is unlikely to produce the result you are expecting.

To discuss microcement finishes for your London property, contact us here or request a free quote.