Sika MonoTop 612 | R4 Class Polymer-Modified Structural Repair Mortar

R4 Class Structural Concrete Repair Mortar

Sika MonoTop®-612 is a one-component, polymer-modified structural repair mortar containing silica fume and fiber reinforcement. Classified as R4 according to EN 1504-3, it has been specifically developed for the repair of load-bearing concrete structures.

Thanks to its low chloride permeability, it provides excellent protection against reinforcement corrosion and ensures long-term durability in demanding environments.

Why Choose Sika MonoTop®-612?

✔ R4 class performance – Provides high compressive strength and adhesion strength
✔ Suitable for structural repairs – Reliable use on columns, beams, walls, and slabs
✔ Silica fume enhanced formulation – Creates a dense and low-permeability structure
✔ Fiber reinforced – Improves crack control and impact resistance
✔ Low chloride permeability – Reduces the risk of reinforcement corrosion
✔ One-component system – Requires only water for mixing and easy application

This product is not a surface smoothing mortar; it is a structural repair solution designed for load-bearing concrete elements.

Applications

Sika MonoTop®-612 is suitable for high-performance structural repair applications, including:

• Column and beam repairs
• Shear wall and structural wall repairs
• Repair of concrete surfaces with exposed reinforcement
• Bridges, viaducts, and infrastructure structures
• Concrete repairs in marine and industrial environments
• Projects requiring high mechanical strength and durability

Technical Classification

Standard: EN 1504-3
Class: R4
Type: Structural repair mortar
Composition: One-component, mixed with water

Sika MonoTop®-612 vs. Sika MonoTop®-620

Sika MonoTop®-620 → R3 Class
Suitable for fine repairs, surface correction, and finishing applications.

Sika MonoTop®-612 → R4 Class
Designed for structural concrete repairs and load-bearing elements.

Choosing the correct repair mortar is critical for long-term performance. For structural repair applications, an R4 class mortar such as Sika MonoTop®-612 should be preferred to ensure durability and safety.