Best Substrates for Microcement
For both renovations and new builds, microcement is our favourite finish for floors, walls, and even furniture, thanks to its ability to be applied over almost any existing hard surface. In this guide, we break down the best substrates for microcement along with the reasons why surface prep is critical, and what to avoid if you want a perfect long-lasting finish — because even the best microcement product can fail if it’s applied to a substrate that hasn’t been properly prepared.
X-Bond Microcement installation over concrete.
Why Substrate Matters in Microcement
Microcement is applied in very thin layers — usually between 2–3mm — so it follows the shape and texture of the surface it’s laid on (and it’s not considered self-levelling). This means that if the substrate is cracked, uneven, or unstable, those flaws will show through or compromise the integrity of the microcement finish.
A strong, stable, and level substrate ensures:
Crack resistance
Strong adhesion
A smooth, seamless appearance
Long-term durability
Preparation may include levelling, crack bridging, or reinforcement with mesh. If you’re resurfacing a damaged area using a DIY microcement kit, it’s possible you might miss the signs of an unsuitable substrate or be ill-equipped to handle the level of prep reqired. This is why we insist that our product X-Bond is installed by a surfacing professional who we’ve trained in-house, and who is capable of assessing and preparing substrates as needed.
Top Substrates for Microcement
Concrete: Concrete is one of the most ideal substrates for microcement as it’s solid, stable, and strong. The most common repairs involve filling and reinforcing cracks or movement joints. Occasionally, really old concrete might be crumbling in places and need some extra TLC with patching compounds.
Cement Render / Screed: A well-cured and level cement-based screed or render offers excellent adhesion and workability for microcement systems. It’s commonly found on interior walls, wet areas, and floors with built-in falls. Something to avoid is a screed with excessive movement or poor compaction.
Plasterboard / Drywall (Interior Only): While less robust than concrete, plasterboard can be a suitable substrate for microcement in dry internal environments.
Tile (Ceramic or Porcelain): Great news for renovations — microcement can be applied directly over existing tile! This saves time and demolition costs when remodelling old bathrooms. Keep in mind it does take some additional prep compared to other substrates, including a new coat of waterproofing membrane, but it’s a lot quicker and easier than ripping out the old tiles.
Plywood / MDF: Did you know we can create custom microcement pieces? Furniture and joinery will be constructed out of MDF before being finished with microcement. Timber substrates require extra attention due to movement and moisture sensitivity, but can work well in controlled environments.
Substrates to Avoid (or Use with Caution)
Unstable or Cracked Surfaces – Microcement is not designed to bridge structural movement. Cracks must be repaired and stabilised before application.
Flexible or Bouncy Floors – Movement can cause cracking in the microcement layer. Ensure floors are solid and well-supported.
Painted or Sealed Surfaces – These prevent proper adhesion. Paints or sealers would be sanded down or removed before application.
Why X-Bond?
We call it the Remodel Without Removal system; whereby microcement can be applied directly over existing surfaces, eliminating the mess and cost of demolition. But why is X-Bond different to other product? Thanks to its excellent adhesion and flexible formulation, it resists cracking over tie and adapts to minor substrate movement. When combined with our two-in-one waterproofing and anti-fracture membrane, it forms a high-performance system that protects against moisture, bridges hairline cracks, and reinforces the surface beneath for future crack prevention — delivering a seamless finish with long-term durability.
Successful microcement installation starts with what’s underneath. While DIY kits can reduce upfront costs, achieving professional-grade results requires expert knowledge and attention to detail. Always follow the technical guidelines from your microcement supplier and don’t cut corners on preparation — it’s the foundation of a beautiful finish.
Planning a microcement project? Discover X-Bond.