Table Of Contents
Every contractor, architect, and homeowner specifying this material lands on the same question: is microcement waterproof in a real shower, or only on a data sheet? Microcement is water-resistant on its own, and it becomes a waterproof surface once it sits over a waterproofing membrane and the right sealer closes the surface. That distinction separates a shower that performs for fifteen years from one that fails in eighteen months. Craftex distributes the systems behind those installations and certifies the applicators who put them in, so what follows reflects both the specification and the site.
Key Takeaways
- Microcement is water-resistant on its own and becomes waterproof as a sealed system over a membrane.
- The membrane underneath is what protects the structure behind your shower wall.
- Sealer specification changes with the environment, and a pool does not take the same topcoat as a bathroom floor.
- Most wet area failures trace back to a skipped membrane or a thin sealer, not the microcement.
- Recoat the sealer every three to five years in a daily-use shower.
Water-resistant material, waterproof system
Waterproof and water-resistant get used interchangeably in sales copy, and the difference matters when water hits a surface daily. Water-resistant slows absorption. Waterproof stops water completely from reaching the substrate.
Cured microcement sits in the first category. The mortar has low porosity by design, but the sealer over it is what closes the surface and makes it impermeable. Left unsealed, microcement takes on moisture and stains. Which sealer depends on where it goes, since a vanity wall, a shower floor, and a pool surround face different loads.
The three layers that do the work
A wet area installation is a system, not a finish. Each layer has a separate job, and the two that keep water out are both invisible once the job is done.
The membrane does the same job it does under a tiled shower, and it disappears from view the moment microcement goes over it. Skipping it to save a day of labor is the most common reason a microcement shower fails.
Is microcement waterproof enough for showers and pools?
Yes, when the full system goes in correctly. Craftex microcement works on shower walls, shower floors, bathtub surrounds, and pool surrounds. No grout lines means no grout to crack, absorb water, or grow mildew.
Showers add one requirement that has nothing to do with the coating: drainage. The floor still needs correct falls to the drain, because standing water on a sealed surface eventually finds a weak point. Wet area build-ups are covered on the microcement shower page.
Pool work is specialist territory. Chlorine, UV exposure, and constant wet-and-dry cycling demand a purpose-built system, which is why microcement pool and deck finishes belong with trained applicators.
Common installation mistakes and how to avoid them
The material is rarely the problem. Failures trace back to decisions made before the first coat goes on, and every one of them is avoidable on a normal schedule and a normal budget. Each is a labor decision, which is why the installer matters more than the brand on the bucket.
Craftex trains and certifies applicators against each of those failure points, and technical support stays available while the job is on site. That is the difference between buying a product and buying an installation.
One more mistake happens after handover: treating a sealed surface as maintenance-free. Maintenance is a pH-neutral cleaner and a recoat every three to five years in a daily-use shower. Resealing is expected wear, not a fault.
Request a Certified Craftex Installer and have your wet area system specified correctly from the substrate up, including the membrane. Contractors who want to apply it themselves can ask about Craftex certification training on the same form.
Frequently Asked Questions
Can microcement go directly over existing bathroom tiles?
Yes, in most cases, which is why it suits renovations that avoid demolition. The tiles must be sound, clean, and firmly bonded, with joints filled first. In a shower, a membrane still goes over the prepared tile.
How often does microcement need resealing in a shower?
Every three to five years in a daily-use shower, and longer for a bathroom floor or vanity wall. Recoating is a same-day job that does not involve stripping the finish. pH-neutral cleaning extends the interval.
Is microcement more waterproof than tile?
The waterproofing comes from the membrane behind the finish in both cases, so neither keeps water out of the wall better. What microcement removes is grout lines, where tiled showers most often stain, crack, and leak.
