Repair Systems
Epoxy anchoring adhesives
High-modulus 2-part epoxy paste for port bonding — technical reference for concrete cracking in Australian remedial building practice. Covers system selection, product comparisons, and brand equivalents.
What is epoxy anchoring adhesives?
Epoxy anchoring adhesives are two-component cartridge or pail products used to chemically fix reinforcing bars, dowels, rods, and anchor bolts into drilled holes in concrete or masonry. They are used wherever structural connections must be established into existing concrete without access to cast-in provisions — rebar laps, connection dowels, structural tie-backs, new column base plates, and post-installed anchors for new structural members. Products are selected based on anchor diameter, embedment depth, required load capacity, and environmental conditions, and ETA-assessed products are required for structural applications per AS 5216. Holes must be cleaned of all dust and debris — typically by compressed air blowing and brushing — to achieve full bond development between the adhesive, the anchor, and the concrete. Temperature management is important: bond strength is reduced below 10°C and pot life is shortened above 30°C.
Product Reference
Scroll right to see all brands. Use each card's TDS link for verified specifications before specifying on any project.
System Description
Bond injection ports to crack surface. Also seals crack face between ports. Allow full cure before injecting.
Technical Properties
- High bond strength for rebar installation, dowels, and structural anchors in concrete
- Fast-cure formulations available for early loading requirements
Limitations
- Temperature sensitive — strength significantly reduced below 10°C
- Cannot be used in water-saturated holes without a specialist water-tolerant formulation
PROCUREMENT SOURCES
System Description
Bond injection ports to crack surface. Also seals crack face between ports. Allow full cure before injecting.
Technical Properties
- High bond strength for rebar installation, dowels, and structural anchors in concrete
- Fast-cure formulations available for early loading requirements
Limitations
- Temperature sensitive — strength significantly reduced below 10°C
- Cannot be used in water-saturated holes without a specialist water-tolerant formulation
PROCUREMENT SOURCES
Fosroc Nitobond EP Paste
2-part structural epoxy paste adhesive, 380 mL cartridge
System Description
Bond injection ports to crack surface. Also seals crack face between ports. Allow full cure before injecting.
Technical Properties
- High bond strength for rebar installation, dowels, and structural anchors in concrete
- Fast-cure formulations available for early loading requirements
Limitations
- Temperature sensitive — strength significantly reduced below 10°C
- Cannot be used in water-saturated holes without a specialist water-tolerant formulation
PROCUREMENT SOURCES
System Description
Bond injection ports to crack surface. Also seals crack face between ports. Allow full cure before injecting.
Technical Properties
- High bond strength for rebar installation, dowels, and structural anchors in concrete
- Fast-cure formulations available for early loading requirements
Limitations
- Temperature sensitive — strength significantly reduced below 10°C
- Cannot be used in water-saturated holes without a specialist water-tolerant formulation
PROCUREMENT SOURCES
Brand Equivalents
Side-by-side view of equivalent products across all major brands.
| Material | Ardex | Sika | Fosroc | Tremco / Other | Parchem / Mapei |
|---|---|---|---|---|---|
| Epoxy paste (port adhesive) | Ardex | Sika Sikadur-31 | Fosroc Nitobond EP Paste | — | Parchem Epoxy Port Adhesive |
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.
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