Repair Systems
Cementitious repair mortars
Cementitious polymer repair mortar — technical reference for concrete spalling in Australian remedial building practice. Covers system selection, product comparisons, and brand equivalents.
What is cementitious repair mortars?
Cementitious repair mortars are cement-based patching compounds used to fill voids, spalls, and defects in concrete where structural demands are lower than those requiring polymer modification. Commonly used by general concretors and remedial contractors for cosmetic repairs, honeycombed concrete reinstatement, and non-structural surface restoration on buildings, retaining walls, and civil works. They are mixed with water on site and applied by trowel or screed board, relying on mechanical and chemical adhesion to the substrate with the assistance of an SBR bonding agent. Most products comply with AS 3600 requirements for strength and exposure class when correctly placed and wet cured. Best suited to large-volume applications where cost efficiency outweighs the performance benefits of polymer-modified alternatives.
Product Reference
Scroll right to see all brands. Use each card's TDS link for verified specifications before specifying on any project.
System Description
General spall repairs where epoxy not required. Apply in layers max 50 mm. Use SBR bonding agent.
Technical Properties
- General purpose cementitious repair mortar — cost-effective for large-area non-structural repairs
- Apply in layers up to 50 mm — suitable for honeycombing void fill and large substrate reinstatement
- Stocked by Waterproofing Direct, Bldcare, and Komerco for online ordering
- Standard SBR bond coat procedure — familiar to most concrete repair contractors
Limitations
- Higher shrinkage than polymer-modified grades — wet curing for minimum 72 hours is critical to limit shrinkage cracking
- Not specified for structural spall repairs requiring EN 1504-3 R3 — use MonoTop-352NFG for structural applications
- Colour varies with water content — consistent mix water essential for uniform appearance
PROCUREMENT SOURCES
System Description
General spall repairs where epoxy not required. Apply in layers max 50 mm. Use SBR bonding agent.
Technical Properties
- MicroTec micro-fibre technology integrated into the mix — reduced bond coat requirement on sound concrete
- High-build to 50 mm in a single pass — reduces number of layers on medium to large spalls
- EN 1504-3 R3 performance with >2.0 MPa pull-off bond strength
- Stocked by Bldcare, Komerco, and Waterproofing Direct for online ordering
Limitations
- Higher cost per bag than standard polymer-modified grades
- Substrate and ambient temperature minimum 5°C — cold weather delays cure
- Not suitable for feathered edges or thin cosmetic profiling — use Ardex Feather Finish for sections below 5 mm
PROCUREMENT SOURCES
System Description
General spall repairs where epoxy not required. Apply in layers max 50 mm. Use SBR bonding agent.
Technical Properties
- EN 1504-3 R3 compliant repair mortar at a cost closer to cementitious grades
- Versatile — honeycombed concrete, spall fill, and substrate reinstatement across multiple defect types
- Low heat of hydration — suitable for mass concrete repair work where thermal cracking is a risk
- Fosroc system compatibility — technical datasheets and ITP documentation available from Fosroc Australia
Limitations
- Not stocked by major online retailers — contact Fosroc Australia directly for supply and current pricing
- Requires Fosroc Nitobond SBR or Nitobond EP bond coat — must be applied wet-on-wet
- Greater shrinkage than polymer-modified grade — extended wet curing required per Fosroc ITP documentation
PROCUREMENT SOURCES
System Description
General spall repairs where epoxy not required. Apply in layers max 50 mm. Use SBR bonding agent.
Technical Properties
- Fast-setting cementitious repair mortar from the Mapei/Parchem system
- Rapid return to service — useful on horizontal surfaces subject to early foot traffic
- General purpose grade suitable for honeycombing and surface void fill
Limitations
- Fast setting shortens working time — placement sequence must be pre-staged, especially in warm conditions
- Confirm current Mapei/Parchem product availability and formulation with Parchem Construction Supplies
- Cementitious shrinkage — wet curing regime required regardless of fast-setting characteristic
PROCUREMENT SOURCES
System Description
General spall repairs where epoxy not required. Apply in layers max 50 mm. Use SBR bonding agent.
Technical Properties
- Tremco Eucocrete RM is the confirmed Tremco cementitious repair mortar for general purpose void fill and substrate reinstatement
- Eucocrete product line is the primary concrete repair system for Tremco CPG Australia
- Compatible with other Tremco CPG system components including primers and coatings
Limitations
- Tremco distribution is more limited than Sika, Fosroc or Ardex — confirm local availability with Tremco CPG Australia
- Verify current product name and specification with Tremco representative before specifying
- Standard cementitious shrinkage risk — wet curing is mandatory
PROCUREMENT SOURCES
Brand Equivalents
Side-by-side view of equivalent products across all major brands.
| Material | Ardex | Sika | Fosroc | Tremco / Other | Parchem / Mapei |
|---|---|---|---|---|---|
| Cementitious repair mortar | Ardex BR 340 | Sika MonoTop-436N | Fosroc Renderoc GP | Tremco Eucocrete RM | Mapei Mapegrout Fast-Set |
Disclaimer
Information is general only. Product selection must be confirmed against project requirements, substrate condition, exposure class, manufacturer technical data sheets, NCC requirements, Australian Standards (including AS 3600), and consultant or structural engineer specifications. Do not rely on this reference as a substitute for professional engineering advice.
Concrete & Structural Defects
Identify defect types, causes, and repair pathways before selecting a system.
Concrete & Structural Defects
Browse all concrete and structural defect subcategories.
Concrete spalling
Browse all product categories for concrete spalling.
Generate a Scope of Works
Use the AI Scope Builder to assemble a remedial scope.