Romabio® UNICO Primer

Romabio® UNICO Primer is the adhesion primer used within the Romabio UNICO Microcement System to prepare smooth, non-absorbent, and difficult-to-coat surfaces before decorative plaster applications. UNICO Primer creates the critical bond between substrates such as ceramic tile, stone, glossy painted surfaces, countertops, sinks, tubs, and other smooth materials and the decorative UNICO finish coats that follow. When combined with Micro Fiber Mesh, UNICO Primer helps create a reinforced foundation for durable microcement installations in showers, countertops, wet areas, and other demanding applications.

UNICO Primer is typically used when applying microcement over smooth or non-absorbent surfaces where additional adhesion is required.

• Create an adhesion bridge between substrate and finish coats.
• Improve bonding on ceramic tile, stone, and glossy surfaces.
• Work in combination with Micro Fiber Mesh reinforcement.
• Provide a stable foundation for decorative plaster layers.
• Support long-term durability in wet-area installations.

Shower Wall Over Tile

• UNICO Primer
• Micro Fiber Mesh
• UNICO Fine / Fino
• UNICO Extra Fine
• UNICO Barrier

Countertops

• UNICO Primer
• Micro Fiber Mesh
• UNICO Fine
• UNICO Extra Fine
• UNICO Topcoat

Sinks & Tubs

• UNICO Primer
• Micro Fiber Mesh
• UNICO Fine / Fino
• UNICO Extra Fine
• UNICO Barrier

For absorbent mineral surfaces, Ecoforte may be used before the primer depending on substrate conditions.

UNICO Primer is one component within the complete Romabio UNICO Microcement System.

Each project requires a different combination of products depending on the substrate and intended use.

• Designed For Microcement Systems – Specifically formulated for use within the Romabio UNICO decorative plaster system.
• Improves Adhesion – Helps decorative plaster layers bond to difficult surfaces.
• Ideal For Tile Renovations – Allows existing tile and stone surfaces to be transformed without demolition.
• Supports Wet-Area Applications – Commonly used in showers, sinks, tubs, and bathroom projects.
• Works With Reinforcement Mesh – Creates a reinforced base layer for demanding installations.

• Do I need UNICO Primer for every project?
  No. UNICO Primer is generally used when additional adhesion is required, particularly on smooth or non-absorbent surfaces such as tile, stone, and glossy coatings.
• Can UNICO Primer be applied over ceramic tile?
  Yes. It is commonly used with Micro Fiber Mesh when applying the UNICO system over existing ceramic tile surfaces.
• Is UNICO Primer used in shower systems?
  Yes. It is a common component of UNICO shower wall systems and other wet-area applications.
• What comes after UNICO Primer?
  Micro Fiber Mesh reinforcement is typically installed before the decorative UNICO plaster coats are applied.
• Is this a standalone finish?
  No. UNICO Primer is a system component and is intended to be used as part of the complete Romabio UNICO Microcement System.