Resin mortars, particularly epoxy-based, are advanced materials designed for repairing and restoring concrete surfaces. They offer superior performance compared to traditional cement-based mortars, making them ideal for demanding repair tasks.
Deterioration of concrete structures can occur due to various factors such as corrosion, structural damage, and water infiltration. Sika offers a comprehensive range of resin-based repair solutions designed to restore, strengthen, and protect concrete structures.
What Are Resinous Repair Mortars and Concretes?
Resin mortars (and concretes) are polymer-modified repair materials that combine a resin binder (typically epoxy, polyurethane, or acrylic) with aggregates and fillers. Their resin matrix imparts excellent adhesion, high mechanical strength, and chemical resistance, allowing them to bond effectively to existing concrete substrates and withstand demanding conditions.
They are widely used for structural repair, anchoring, grouting, smoothing, and protective overlays. Unlike purely cementitious systems, resin mortars cure rapidly (even at low temperatures), have low permeability, and can better resist shrinkage, cracking, and deterioration from chemicals or freeze–thaw cycles.
Key Characteristics
Repair and New Construction Mortars and Concretes
Repair and new construction mortars and concretes are polymer-modified or resin-based repair materials designed for both restoration and new build applications. They combine resin binders with graded aggregates to deliver high strength, fast curing, and excellent adhesion.
These systems are engineered to integrate with existing structures while providing durability and structural performance.
Resin Smoothing Mortars
Resin smoothing mortars are fine, polymer-modified mortars formulated to provide a level, high-performance finish over concrete substrates. They are designed to fill minor surface irregularities, create a smooth overlay, and act as a bridging or leveling layer before final coatings or traffic layers.
Unlike coarse repair mortars, smoothing mortars focus on surface texture, aesthetics, and preparatory performance, while still retaining the beneficial properties of resin systems such as strong adhesion, low permeability, and durability.
Precast Concrete Mortars
Precast concrete mortars are specialised repair and bonding mortars designed for use with precast and segmental concrete elements. They include Segment Unit Repair Mortars for reinstating and repairing damage to precast segments, as well as Bedding and Rebedding Mortars used to accurately align, level, and secure elements during installation or assembly.
These mortars combine high bond strength, low shrinkage, and excellent durability to ensure both the structural and aesthetic performance of precast concrete components. Whether used in on-site assembly or during maintenance, Sika’s range of precast concrete mortars ensures long-term reliability and precision.
Highway Construction and Maintenance
Sika’s range of resin-based mortars and concretes for highway construction and maintenance are engineered to perform under the toughest conditions — high traffic loading, chemical attack, freeze–thaw exposure, and continuous vibration.
These systems offer exceptional adhesion, rapid strength gain, and long-term durability, ensuring safe, reliable reinstatement and installation works on the UK’s roads and moterways.
