Microcement Sealing – Products, Process and Schedule

Why Sealing is Essential for Microcement

Microcement is a cementitious material — porous by nature. In its unsealed state, it will absorb water, oils, wine, coffee and any other liquid it comes into contact with, developing permanent staining that is very difficult to remove. The sealant layer applied over the finished microcement is what transforms it from a porous surface into a waterproof, stain-resistant, durable interior finish. Without the sealant, microcement is not a viable interior surface.

The sealant also protects the microcement from mechanical wear — foot traffic, chair and table legs, and the general abrasion of daily use. The microcement itself is durable, but unsealant it would wear and powder under foot traffic over time. The sealant provides a protective film that takes the wear and can be renewed periodically through resealing — a straightforward maintenance operation that extends the life of the installation significantly.

Choosing the Right Sealant

Water-based PU sealant is the most common choice for residential walls and dry areas. It has low odour, is easy to apply and clean up, and produces a durable, attractive finish. For residential floors — particularly in bathrooms and kitchens — a solvent-based PU provides higher abrasion resistance and a superior finish depth. For the most demanding wet environments and commercial floors, a two-component epoxy provides maximum waterproofing and chemical resistance, though it is less flexible than PU and requires precise mixing and application conditions.

Anti-Slip Additive

For any wet floor — showers, wet rooms, pool surrounds, changing rooms — an anti-slip additive must be incorporated in the sealant. This is not optional. It provides the grip necessary to prevent slipping on a wet surface and is required by safety and building regulations for commercial applications. Our certified applicators specify anti-slip treatment as standard for all wet floor applications.